Tunneling anisotropic magnetoresistance in organic spin valves (2009)
Gruenewald, M., Wahler, M., Michelfeit, M., Gould, C., Schmidt, R., Graziosi, P., ...
We report the observation of tunneling anisotropic magnetoresistance (TAMR) in an organic spin valve with only one ferromagnetic electrode. The spin valve is based on a new high mobility perylene...
Lateral magnetic anisotropy superlattice out of a single (Ga,Mn)As layer (2009)
Dengel, R. G., Gould, C., Wenisch, J., Brunner, K., Schmidt, G., Molenkamp, L. W.
We use lithographically induced strain relaxation to periodically modulate the magnetic anisotropy in a single (Ga,Mn)As layer. This results in a lateral magnetoresistance device where two...
Fermi-edge Singularity in II-VI Semiconductor Resonant Tunneling Structures (2009)
Rueth, M., Slobodskyy, T., Gould, C., Schmidt, G., Molenkamp, L. W.
We report on the observation of Fermi edge enhanced resonant tunneling transport in a II-VI semiconductor heterostructure. The resonant transport through a self assembled CdSe quantum dot survives up...
Independent magnetization behavior of a ferromagnetic metal/semiconductor hybrid system (2008)
Mark, S., Gould, C., Pappert, K., Wenisch, J., Brunner, K., Schmidt, G., ...
We report the discovery of an effect where two ferromagnetic materials, one semiconductor ((Ga,Mn)As) and one metal (permalloy), can be directly deposited on each other and still switch their...
Non-thermal photocoercivity effect in a ferromagnetic semiconductor (2008)
Astakhov, G. V., Hoffmann, H., Korenev, V. L., Kiessling, T., Schwittek, J., Schott, G. M., ...
We report a photoinduced change of the coercive field, i.e., a photocoercivity effect (PCE), under very low intensity illumination of a low-doped (Ga,Mn)As ferromagnetic semiconductor. We find a...
Detailed transport investigation of the magnetic anisotropy of (Ga,Mn)As (2008)
Pappert, K., Gould, C., Sawicki, M., Wenisch, J., Brunner, K., Schmidt, G., ...
This paper discusses transport methods for the investigation of the (Ga,Mn)As magnetic anisotropy. Typical magnetoresistance behaviour for different anisotropy types is discussed, focusing on an in...
An extensive comparison of anisotropies in MBE grown (Ga,Mn)As material (2008)
Gould, C., Mark, S., Pappert, K., Dengel, G., Wenisch, J., Campion, R. P., ...
This paper reports on a detailed magnetotransport investigation of the magnetic anisotropies of (Ga,Mn)As layers produced by various sources worldwide. Using anisotropy fingerprints to identify...
B. Schmid, A. Müller, M. Sing, R. Claessen, J. Wenisch, ...
Journal article
Jungwirth, T., Sinova, Jairo, MacDonald, A. H., Gallagher, B. L., Novak, V., Edmonds, K. W., ...
We discuss the character of states near the Fermi level in Mn doped GaAs, as revealed by a survey of dc transport and optical studies over a wide range of Mn concentrations. A thermally activated...
Bound hole states in a ferromagnetic (Ga,Mn)As environment (2007)
Schmidt, M. J., Pappert, K., Gould, C., Schmidt, G., Oppermann, R., Molenkamp, L. W.
A numerical technique is developed to solve the Luttinger-Kohn equation for impurity states directly in k-space and is applied to calculate bound hole wave functions in a ferromagnetic (Ga,Mn)As...
Resonant tunneling diode with spin polarized injector (2007)
Slobodskyy, A., Gould, C., Slobodskyy, T., Schmidt, G., Molenkamp, L. W., Sanchez, D.
We investigate the current-voltage characteristics of a II-VI semiconductor resonant-tunneling diode coupled to a diluted magnetic semiconductor injector. As a result of an external magnetic field, a...
Exploiting Locally Imposed Anisotropies in (Ga,Mn)As: a Non-volatile Memory Device (2007)
Pappert, K., Hümpfner, S., Gould, C., Wenisch, J., Brunner, K., Schmidt, G., ...
Progress in (Ga,Mn)As lithography has recently allowed us to realize structures where unique magnetic anisotropy properties can be imposed locally in various regions of a given device. We make use of...
Control of magnetic anisotropy in (Ga,Mn)As by lithography-induced strain relaxation (2007)
Wenisch, J., Gould, C., Ebel, L., Storz, J., Pappert, K., Schmidt, M. J., ...
We obtain control of magnetic anisotropy in epitaxial (Ga,Mn)As by anisotropic strain relaxation in patterned structures. The strain in the structures is characterized using sophisticated X-ray...
Control of magnetic anisotropy in (Ga,Mn)As by lithography-induced strain relaxation (2007)
J. Wenisch, C. Gould, L. Ebel, J. Storz, K. Pappert, ...
Journal article
Lithographic engineering of anisotropies in (Ga,Mn)As (2006)
Hümpfner, S., Sawicki, M., Pappert, K., Wenisch, J., Brunner, K., Gould, C., ...
The focus of studies on ferromagnetic semiconductors is moving from material issues to device functionalities based on novel phenomena often associated with the anisotropy properties of these...
Transport Characterization of the Magnetic Anisotropy of (Ga,Mn)As (2006)
Pappert, K., Hümpfner, S., Wenisch, J., Brunner, K., Gould, C., Schmidt, G., ...
The rich magnetic anisotropy of compressively strained (Ga,Mn)As has attracted great interest recently. Here we discuss a sensitive method to visualize and quantify the individual components of the...
Magnetization-Switched Metal-Insulator Transition in a (Ga,Mn)As Tunnel Device (2006)
Pappert, K., Schmidt, M. J., Hümpfner, S., Rüster, C., Schott, G. M., Brunner, K., ...
We observe the occurrence of an Efros-Shklovskii gap in (Ga,Mn)As based tunnel junctions. The occurrence of the gap is controlled by the extent of the hole wave-function on the Mn acceptor atoms....
Current Assisted Magnetization Switching in (Ga,Mn)As Nanodevices (2006)
Gould, C., Pappert, K., Rüster, C., Giraud*, R., Borzenko, T., Schott, G. M., ...
Current induced magnetization switching and resistance associated with domain walls pinned in nanoconstrictions have both been previously reported in (Ga,Mn)As based devices, but using very...
Tunneling magnetoresistance in devices based on epitaxial NiMnSb with uniaxial anisotropy (2005)
Liu, J., Girgis, E., Bach, P., Ruester, C., Gould, C., Schmidt, G., ...
We demonstrate tunnel magnetoresistance (TMR) junctions based on a tri layer system consisting of an epitaxial NiMnSb, aluminum oxide and CoFe tri layer. The junctions show a tunnelling...
Self Assembled II-VI Magnetic Quantum Dot as a Voltage-Controlled Spin-Filter (2005)
Gould, C., Slobodskyy, A., Slobodskyy, T., Grabs, P., Supp, D., Hawrylak, P., ...
A key element in the emergence of a full spintronics technology is the development of voltage controlled spin filters to selectively inject carriers of desired spin into semiconductors. We previously...
King, E., Kendall, K., Wiles, R., Rosenvinge, H., Gould, C., Kendrick, A.
Aim: To explore the feasibility of holding critical incident reviews (CIRs) after patient suicides in general practice and their ability to change practice. Methods: Thirteen practices were invited...
King, E., Kendall, K., Wiles, R., Rosenvinge, H., Gould, C., Kendrick, A.
Aim: To explore the feasibility of holding critical incident reviews (CIRs) after patient suicides in general practice and their ability to change practice. Methods: Thirteen practices were invited...
King, E., Kendall, K., Wiles, R., Rosenvinge, H., Gould, C., Kendrick, A.
Aim: To explore the feasibility of holding critical incident reviews (CIRs) after patient suicides in general practice and their ability to change practice. Methods: Thirteen practices were invited...
King, E., Kendall, K., Wiles, R., Rosenvinge, H., Gould, C., Kendrick, A.
Aim: To explore the feasibility of holding critical incident reviews (CIRs) after patient suicides in general practice and their ability to change practice. Methods: Thirteen practices were invited...
Rader,O., Fauth,K., Gould,C., Rüster,C., Schott,G. M., Schmidt,G., ...
An exploratory study of critical incident reviews in general practice after patient suicides (2005)
King, E., Kendall, K., Rosenvinge, H., Gould, C., Wiles, R., Kendrick, T.
Aim: To explore the feasibility of holding critical incident reviews (CIRs) after patient suicides in general practice and their ability to change practice. Methods: Thirteen practices were invited...
King, E., Kendall, K., Wiles, R., Rosenvinge, H., Gould, C., Kendrick, A. R.
Aim: To explore the feasibility of holding critical incident reviews (CIRs) after patient suicides in general practice and their ability to change practice. Methods: Thirteen practices were invited...
Structural and magnetic properties of NiMnSb/InGaAs/InP(001) (2005)
A. Koveshnikov, G. Woltersdorf, J.Q. Liu, B. Kardasz, O. Mosendz, ...
Journal article
King, E., Kendall, K., Wiles, R., Rosenvinge, H., Gould, C., Kendrick, A.
Aim: To explore the feasibility of holding critical incident reviews (CIRs) after patient suicides in general practice and their ability to change practice. Methods: Thirteen practices were invited...
Molecular-beam epitaxy of (Zn,Mn)Se on Si(100) (2004)
Slobodskyy, T., Rüster, C., Fiederling, R., Keller, D., Gould, C., Ossau, W., ...
We have investigated the growth by molecular-beam epitaxy of the II-VI diluted magnetic semiconductor (Zn,Mn)Se on As-passivated Si(100) substrates. The growth start has been optimized by using...
Temperature Dependent Magnetic Anisotropy in (Ga,Mn)As Layers (2004)
Sawicki, M., Matsukura, F., Idziaszek, A., Dietl, T., Schott, G. M., Ruester, C., ...
It is demonstrated by SQUID measurements that (Ga,Mn)As films can exhibit perpendicular easy axis at low temperatures, even under compressive strain, provided that the hole concentration is...
1500-fold Tunneling Anisotropic Magnetoresistance in a (Ga,Mn)As stack (2004)
Rüster, C., Gould, C., Jungwirth, T., Sinova, J., Schott, G. M., Giraud, R., ...
We report the discovery of a super-giant tunneling anisotropic magnetoresistance in an epitaxially grown (Ga,Mn)As/GaAs/(Ga,Mn)As structure. The effect arises from a strong dependence of the...
Gould, C., Rüster, C., Jungwirth, T., Girgis, E., Schott, G. M., Giraud, R., ...
We introduce a new class of spintronics devices in which a spin-valve like effect results from strong spin-orbit coupling in a single ferromagnetic layer rather than from injection and detection of a...
Ramp metering development in a UK context (2004)
Gould, C., Rayman, N., McCabe, K., Schofield, M., Hermans, F., Munro, P., ...
The article discusses operational experience and assessment work during 2002/2003, in particular the approach to ramp metering now operating on the M6 motorway in the UK Midlands, and further work...
Very large magnetoresistance in lateral ferromagnetic (Ga,Mn)As wires with nanoconstrictions (2003)
Ruester, C., Borzenko, T., Gould, C., Schmidt, G., Molenkamp, L. W., Liu, X., ...
We have fabricated (Ga,Mn)As nanostructures in which domain walls can be pinned by sub-10 nm constrictions. Controlled by shape anisotropy, we can switch the regions on either side of the...
Voltage-Controlled Spin Selection in a Magnetic Resonant Tunnelling Diode (2003)
Slobodskyy, A., Gould, C., Slobodskyy, T., Becker, C. R., Schmidt, G., Molenkamp, L. W.
We have fabricated all II-VI semiconductor resonant tunneling diodes based on the (Zn,Mn,Be)Se material system, containing dilute magnetic material in the quantum well, and studied their...
Synthesis and characterization of manganese-doped CdS nanoparticles (2003)
Barglik-Chory, C., Remenyi, C., Dem, C., Schmitt, M., Kiefer, W., Gould, C., ...
Spin injection in the non-linear regime: band bending effects (2002)
Schmidt, G., Gould, C., Grabs, P., Lunde, A. M., Richter, G., Slobodskyy, A., ...
Semiconductor spintronics will need to control spin injection phenomena in the non-linear regime. In order to study these effects we have performed spin injection measurements from a dilute magnetic...
Oxidation of Sulfur and Amine Model Compounds. (2002)
Mill,T., Piszkiewicz,L., Mayo,F., Gould,C.
This study is directed toward evaluating these different ways of activating oxygen to oxidize sulfur and amine simulants for toxic agents at useful rates. Free-radical initiated and photooxidation of...
Oxidation of Sulfur and Amine Model Compounds. (2002)
Mill,T., Mayo,F. R., Piszkiewicz,L., Gould,C.
Rapid removal of toxic agents from surfaces by techniques that employ atmospheric oxygen as the reactive species have considerable advantage over chemical or physical techniques that require spray,...
Little, P., Gould, C., Moore, M., Warner, G., Dunleavey, J., Williamson, I.
OBJECTIVES: To identify which children with acute otitis media are at risk of poor outcome and to assess benefit from antibiotics in these children. DESIGN: Secondary analysis of randomised...
Large magnetoresistance effect due to spin-injection into a non-magnetic semiconductor (2001)
Schmidt, G., Richter, G., Grabs, P., Gould, C., Ferrand, D., Molenkamp, L. W.
A novel magnetoresistance effect, due to the injection of a spin-polarized electron current from a dilute magnetic into a non-magnetic semiconductor, is presented. The effect results from the...
Spin filtering and magnetoresistance in ballistic tunnel junctions (2001)
Egues, J. C., Gould, C., Richter, G., Molenkamp, L. W.
We theoretically investigate magnetoresistance (MR) effects in connection with spin filtering in quantum-coherent transport through tunnel junctions based on non-magnetic/semimagnetic...
Little, P., Everitt, H., Williamson, I., Warner, G., Moore, M., Gould, C., ...
OBJECTIVE: To measure patients' perceptions of patient centredness and the relation of these perceptions to outcomes. DESIGN: Observational study using questionnaires. SETTING: Three general...
Little, P., Everitt, H., Williamson, I., Warner, G., Moore, M., Gould, C., ...
Objective: To identify patient's preferences for patient centred consultation in general practice. Design: Questionnaire study. Setting: Consecutive patients in the waiting room of three doctors'...
Little, P., Gould, C., Williamson, I., Moore, M., Warner, G., Dunleavey, J.
OBJECTIVE: To compare immediate with delayed prescribing of antibiotics for acute otitis media. DESIGN: Open randomised controlled trial. Setting: General practices in south west England....
Addition spectrum of a lateral dot from Coulomb and spin-blockade spectroscopy (2000)
Ciorga, M., Sachrajda, A. S., Hawrylak, P., Gould, C., Zawadzki, P., Jullian, S., ...
The Addition Spectrum of a Lateral Dot from Coulomb and Spin Blockade Spectroscopy (1999)
Ciorga, M., Sachrajda, A. S., Hawrylak, P., Gould, C., Zawadzki, P., Jullian, S., ...
Transport measurements are presented on a class of electrostatically defined lateral dots within a high mobility two dimensional electron gas (2DEG). The new design allows Coulomb Blockade(CB)...
Spin depolarization in quantum dots (1999)
Sachrajda,A.S., Gould,C., Hawrylak,P., Feng,Y., Zawadzki,P., Wasilewski,Z.
We have performed single electron spectroscopy experiments on single lateral quantum dots. We demonstrate that the lateral nature of the tunneling as well as the properties of the 2DEG leads can be...
Solar Fusion Cross Sections (1998)
Adelberger, E., Austin, S., Bahcall, J., Balantekin, A., Bogaert, G., Brown, L., ...
We review and analyze the available information for nuclear fusion cross sections that are most important for solar energy generation and solar neutrino production. We provide best values for the...
Fractal Conductance Fluctuations in a Soft Wall Stadium and a Sinai Billiard (1997)
Sachrajda, A. S., Ketzmerick, R., Gould, C., Feng, Y., Kelly, P. J., Delage, A., ...
Conductance fluctuations have been studied in a soft wall stadium and a Sinai billiard defined by electrostatic gates on a high mobility semiconductor heterojunction. These reproducible...
Resonance Patterns of an Antidot Cluster: From Classical to Quantum Ballistics (1997)
Kirczenow, George, Johnson, Brad L., Kelly, P. J., Gould, C., Sachrajda, A. S., Feng, Y., ...
We explain the experimentally observed Aharonov-Bohm (AB) resonance patterns of an antidot cluster by means of quantum and classical simulations and Feynman path integral theory. We demonstrate that...
PARITY VIOLATION IN 239U NEUTRON RESONANCES (1990)
PenttilÄ, S., Bowman, C., Bush, J., Delheij, P., Frankle, C., Gould, C., ...
Parity nonconservation was studied in 239U by measuring the helicity dependence of the p-wave resonance cross section for epithermal neutrons scattered from 238U. A statistical approach was used to...
PARITY VIOLATION IN 239U NEUTRON RESONANCES (1990)
PenttilÄ, S., Bowman, C., Bush, J., Delheij, P., Frankle, C., Gould, C., ...
Parity nonconservation was studied in 239U by measuring the helicity dependence of the p-wave resonance cross section for epithermal neutrons scattered from 238U. A statistical approach was used to...
PARITY VIOLATION IN 239U NEUTRON RESONANCES (1990)
PenttilÄ, S., Bowman, C., Bush, J., Delheij, P., Frankle, C., Gould, C., ...
Parity nonconservation was studied in 239U by measuring the helicity dependence of the p-wave resonance cross section for epithermal neutrons scattered from 238U. A statistical approach was used to...
ORDER PARAMETER SINGULARITIES IN SUPERFLUID 3He CONFINED TO SMALL CYLINDERS (1978)
We have placed superfluid 3He-A into very narrow cylinders in order to stabilize textures with dependable topological singularities. The resulting singular textures are studied by NMR.
ORDER PARAMETER SINGULARITIES IN SUPERFLUID 3He CONFINED TO SMALL CYLINDERS (1978)
We have placed superfluid 3He-A into very narrow cylinders in order to stabilize textures with dependable topological singularities. The resulting singular textures are studied by NMR.
ORDER PARAMETER SINGULARITIES IN SUPERFLUID 3He CONFINED TO SMALL CYLINDERS (1978)
We have placed superfluid 3He-A into very narrow cylinders in order to stabilize textures with dependable topological singularities. The resulting singular textures are studied by NMR.
Open randomised trial of prescribing strategies in managing sore throat.
Little, P., Williamson, I., Warner, G., Gould, C., Gantley, M., Kinmonth, A. L.
OBJECTIVE: To assess three prescribing strategies for sore throat. DESIGN: Randomised follow up study. SETTING: 11 general practices in the South and West region. SUBJECTS: 716 patients aged 4 years...
Little, P., Gould, C., Williamson, I., Warner, G., Gantley, M., Kinmonth, A. L.
OBJECTIVE: To assess the medicalising effect of prescribing antibiotics for sore throat. SETTING: 11 general practices in England. DESIGN: Randomised trial of three approaches to sore throat: a 10...
Phillips, M J, Ollier, S, Gould, C, Davies, R J
The inhibition of immediate allergen or histamine induced airflow obstruction by inhaled ketotifen, clemastine, sodium cromoglycate, and placebo was studied in two groups of asthmatic subjects....
King, E, Kendall, K, Wiles, R, Rosenvinge, H, Gould, C, Kendrick, A
Aim: To explore the feasibility of holding critical incident reviews (CIRs) after patient suicides in general practice and their ability to change practice.
Fowlie, P, Tarnow-Mordi, W, Gould, C, Strang, D
AIM—To investigate the feasibility of developing an objective tool for predicting death and severe disability using routinely available data, including an objective measure of illness severity, in...
UK neonatal intensive care services in 1996
Tucker, J., Tarnow-Mordi, W., Gould, C., Parry, G., Marlow, N.
A census of activity and staff levels in 1996 was conducted in UK neonatal units and achieved a 100% response from 246 units. Among the 186 neonatal intensive care units, the median (interquartile...