TY - JOUR
T1 - Effect of low-valent atom substitution on electronic structure and magnetic properties of Fe1.5M0.5CoSi (M=V, Cr, Mn, Fe) Heusler alloys
AU - Luo, Hongzhi
AU - Meng, Fanbin
AU - Cai, Yanqiang
AU - Hong, Wangwen
AU - Liu, Enke
AU - Wu, Guangheng
AU - Zhu, Xiaoxi
AU - Jiang, Chengbao
PY - 2011/9
Y1 - 2011/9
N2 - Quaternary Heusler alloys Fe1.5M0.5CoSi with M=V, Cr, Mn and Fe have been investigated theoretically and experimentally. All of these samples crystallize in the ordered Heusler-type structure. The calculated electronic structure shows a pseudogap around EF in the minority spin states of Fe2CoSi. With the substitution of low-valent atoms for Fe, the majority antibonding peak is shifted to higher energy and a minority gap around the Fermi level is opened. High spin polarization ratio is obtained in Fe1.5M0.5CoSi (M=V, Cr, Mn) alloys. The calculated total spin moments decrease with decreasing number of valence electrons and follow the SlaterPauling curve, which agree with the experimental results well. The Curie temperature decreases as M atom varies from Fe to V, but is always higher than 650 K, which is suitable for technical applications.
AB - Quaternary Heusler alloys Fe1.5M0.5CoSi with M=V, Cr, Mn and Fe have been investigated theoretically and experimentally. All of these samples crystallize in the ordered Heusler-type structure. The calculated electronic structure shows a pseudogap around EF in the minority spin states of Fe2CoSi. With the substitution of low-valent atoms for Fe, the majority antibonding peak is shifted to higher energy and a minority gap around the Fermi level is opened. High spin polarization ratio is obtained in Fe1.5M0.5CoSi (M=V, Cr, Mn) alloys. The calculated total spin moments decrease with decreasing number of valence electrons and follow the SlaterPauling curve, which agree with the experimental results well. The Curie temperature decreases as M atom varies from Fe to V, but is always higher than 650 K, which is suitable for technical applications.
KW - Electronic structure
KW - Half-metal
KW - Heusler alloy
KW - Magnetic property
UR - https://www.scopus.com/pages/publications/79957444370
U2 - 10.1016/j.jmmm.2011.04.015
DO - 10.1016/j.jmmm.2011.04.015
M3 - 文章
AN - SCOPUS:79957444370
SN - 0304-8853
VL - 323
SP - 2323
EP - 2327
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
IS - 17
ER -