TY - JOUR
T1 - Spin polarization measurements of Co2Mn (Ga0.5Sn 0.5) thin films
AU - Varaprasad, B. S.D.Ch S.
AU - Rajanikanth, A.
AU - Takahashi, Y. K.
AU - Hono, K.
N1 - Funding Information:
B.S.D.Ch.S. Varaprasad and A. Rajanikanth acknowledge the National Institute for Materials Science (NIMS) for the provision of a NIMS junior research assistantship and an ICYS fellowship, respectively. This work was in part supported by Grant-in-Aids for Scientific Research (A) (Grant no. 22246091 ), PREST-JST and the World Premier International Research Center (WPI) Initiative on Materials Nanoarchitronics, MEXT, Japan.
PY - 2011/12
Y1 - 2011/12
N2 - Co2MnGa0.5Sn0.5 (CMGS) thin films were epitaxially grown on MgO (0 0 1) substrates by magnetron sputtering and the current spin polarizations of the films with different post annealing conditions were measured by the point contact Andreev reflection method. The film deposited at a substrate temperature of 150 °C had a B2 structure and its spin polarization was estimated to be 59%. The film was ordered to the L2 1 structure by annealing at 600 °C, and the spin polarization was enhanced to 66%. The spin polarization and the intensity of the L21 diffraction showed clear correlation, suggesting L21 ordering is essential to achieve higher spin polarization of this quaternary Heusler alloy.
AB - Co2MnGa0.5Sn0.5 (CMGS) thin films were epitaxially grown on MgO (0 0 1) substrates by magnetron sputtering and the current spin polarizations of the films with different post annealing conditions were measured by the point contact Andreev reflection method. The film deposited at a substrate temperature of 150 °C had a B2 structure and its spin polarization was estimated to be 59%. The film was ordered to the L2 1 structure by annealing at 600 °C, and the spin polarization was enhanced to 66%. The spin polarization and the intensity of the L21 diffraction showed clear correlation, suggesting L21 ordering is essential to achieve higher spin polarization of this quaternary Heusler alloy.
KW - Heusler alloy
KW - High spin polarization
KW - Point contact Andreev reflection
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U2 - 10.1016/j.jmmm.2011.06.063
DO - 10.1016/j.jmmm.2011.06.063
M3 - Article
AN - SCOPUS:80051577998
SN - 0304-8853
VL - 323
SP - 3092
EP - 3097
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
IS - 23
ER -