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27 papers · 2 filters
Incommensurate magnetic ordering in Cu2Te2O5X2 (X=Cl, Br) studied by single crystal neutron diffraction
O. Zaharko, H. Ronnow, J. Mesot +8
Polarized and unpolarized neutron diffraction studies have been carried out on single crystals of the coupled spin tetrahedra systems Cu2Te2O5X2 (X=Cl, Br). A model of the magnetic…
Control of Coercivities in (Ga,Mn)As Thin Films by Small Concentrations of MnAs Nanoclusters
K. Y. Wang, M. Sawicki, K. W. Edmonds +6
We demonstrate that low concentrations of a secondary magnetic phase in (Ga,Mn)As thin films can enhance the coercivity by factors up to ~100 without significantly degrading the Cu…
Preferential arrangement of uniform Mn nanodots on Si(111)-7x7 surface
De-yong Wang, Li-jun Chen, Wei He +2
Under proper growth conditions, ordered and uniform Mn nanodots were fabricated on the Si(111)-7x7 surface without the presence of a wetting layer. Furthermore, the Mn nanodots dep…
Tight-binding model of spin-polarized tunnelling in (Ga,Mn)As-based structures
P. Sankowski, P. Kacman, J. Majewski +1
The Landauer-Buettiker formalism combined with the tight-binding transfer matrix method is used to describe the results of recent experiments: the high tunneling magnetoresistance…
First-principles calculations of a high-pressure synthesized compound PtC
L. Y. Li, W. Yu, C. Q. Jin
First-principles density-functional method is used to study the recently high-pressure synthesized compound PtC. It is confirmed by our calculations that the platinum carbide has a…
Low-temperature magnetization of (Ga,Mn)As semiconductors
T. Jungwirth, J. Masek, K. Y. Wang +12
We report on a comprehensive study of the ferromagnetic moment per Mn atom in (Ga,Mn)As ferromagnetic semiconductors. Theoretical discussion is based on microscopic calculations an…