A. D. Giddings
University of Nottingham
11 Papers
61 Citations
A. D. Giddings is an academic researcher from University of Nottingham. The author has contributed to research in topics: Ferromagnetism & Magnetoresistance. The author has an hindex of 7, co-authored 10 publications. Previous affiliations of A. D. Giddings include Hitachi.
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Papers
Large tunneling anisotropic magnetoresistance in (Ga,Mn)As nanoconstrictions.
A. D. Giddings,A. D. Giddings,M. N. Khalid,Tomas Jungwirth,Joerg Wunderlich,Shazia Yasin,R. P. Campion,K. W. Edmonds,Jairo Sinova,Kenchi Ito,Kaiyou Wang,David A. Williams,B. L. Gallagher,C. T. Foxon +13 more
TL;DR: In this paper, a large tunneling anisotropic magnetoresistance (TAMR) was observed in the same lateral geometry as AMR. The TAMR does not require noncollinear magnetization on either side of the constriction.
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Transport and Magnetism in p-type cubic (Ga,Mn)N
K. W. Edmonds,Sergei V. Novikov,Maciej Sawicki,R. P. Campion,C.R. Staddon,A. D. Giddings,Lixia Zhao,Kaiyou Wang,Tomasz Dietl,C. T. Foxon,B. L. Gallagher +10 more
TL;DR: The electrical and magnetic properties of cubic GaN thin films grown by plasma-assisted molecular beam epitaxy are reported in this paper, where hole concentrations in excess of 1018 cm-3 at room temperature are observed, characterised by acceptor ionisation energy of around 45-60meV.
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Mn doping and p-type conductivity in zinc-blende GaMnN layers grown by molecular beam epitaxy
Sergei V. Novikov,K. W. Edmonds,Lixia Zhao,A. D. Giddings,Kaiyou Wang,R. P. Campion,C.R. Staddon,Michael W. Fay,Y. Han,Paul D. Brown,Maciej Sawicki,B. L. Gallagher,C. T. Foxon +12 more
TL;DR: In this article, a cubic cubic GaN film was grown by plasma assisted molecular beam epitaxy on GaAs (001) substrates and Hall effect measurements unambiguously showed that the GaMnN samples had strong p-type conductivity.
20
AMR and magnetometry studies of ultra thin GaMnAs films
TL;DR: In this article, the authors measured the AMR of ultra thin Ga0.95Mn0.05As films and found that the sign of AMR can be positive or negative, which may depend on the direction of the current with respect to the crystal.
13
Search For Hole Mediated Ferromagnetism In Cubic (Ga,Mn)N
Maciej Sawicki,Tomasz Dietl,C. T. Foxon,Sergei V. Novikov,R. P. Campion,K. W. Edmonds,Kaiyou Wang,A. D. Giddings,B. L. Gallagher +8 more
- 02 Aug 2005
TL;DR: In this article, the results of magnetisation measurements on p−type zincblende (Ga,Mn) N were reported, and a small high temperature ferromagnetic signal was detected among the remaining Mn ions, which was assigned to the onset of hole-mediated ferromagnetism in Ga1−xMnxN.
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