TY - JOUR
T1 - Fluorescence extended X-ray absorption fine structure analysis of half-metallic ferromagnet "zinc-blende CrAs" grown on GaAs by molecular beam epitaxy
AU - Ofuchi, H.
AU - Mizuguchi, M.
AU - Ono, K.
AU - Oshima, M.
AU - Akinaga, H.
AU - Manago, T.
N1 - Funding Information:
The authors would like to acknowledge Dr. Kimura (Hiroshima Univ.) for providing the EXAFS data of the CrAs powder. These works were partly supported by the New Energy and Industrial Technology Development Organization (NEDO) and grand-in-aid for Scientific Research from the Ministry of Education, Science, Sports and Culture, Japan. EXAFS studies were performed as part of a project (Project No. 2002G239) accepted by the Photon Factory Program Advisory Committee.
PY - 2003/1
Y1 - 2003/1
N2 - In this work, geometric structures for a half-metallic ferromagnet "zinc-blende CrAs", which showed ferromagnetic behavior beyond room temperature, were investigated using fluorescence extended X-ray absorption fine structure (EXAFS) measurement. The EXAFS measurements revealed that As atoms around Cr atoms in the 2 nm CrAs film grown on a GaAs(001) substrate were coordinated tetrahedrally, indicating formation of zinc-blende CrAs. The Cr-As bond length in the zinc-blende CrAs is 2.49 Å. This value is close to that which was estimated from the lattice constant (5.82 Å) of ferromagnetic zinc-blende CrAs calculated by full-potential linearized augmented-plane wave method. The EXAFS analysis show that the theoretically predicted zinc-blende CrAs can be fabricated on GaAs(001) substrate by low-temperature molecular-beam epitaxy.
AB - In this work, geometric structures for a half-metallic ferromagnet "zinc-blende CrAs", which showed ferromagnetic behavior beyond room temperature, were investigated using fluorescence extended X-ray absorption fine structure (EXAFS) measurement. The EXAFS measurements revealed that As atoms around Cr atoms in the 2 nm CrAs film grown on a GaAs(001) substrate were coordinated tetrahedrally, indicating formation of zinc-blende CrAs. The Cr-As bond length in the zinc-blende CrAs is 2.49 Å. This value is close to that which was estimated from the lattice constant (5.82 Å) of ferromagnetic zinc-blende CrAs calculated by full-potential linearized augmented-plane wave method. The EXAFS analysis show that the theoretically predicted zinc-blende CrAs can be fabricated on GaAs(001) substrate by low-temperature molecular-beam epitaxy.
KW - Arsenic compounds
KW - Chromium compounds
KW - EXAFS
KW - Half-metallic ferromagnet
KW - X-ray fluorescence analysis
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U2 - 10.1016/S0168-583X(02)01539-2
DO - 10.1016/S0168-583X(02)01539-2
M3 - Article
AN - SCOPUS:0037246817
SN - 0168-583X
VL - 199
SP - 227
EP - 230
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
ER -