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High spin polarization in CoFeMnGe equiatomic quaternary Heusler alloy

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Title High spin polarization in CoFeMnGe equiatomic quaternary Heusler alloy
 
Creator BAINSLA, L
SURESH, KG
NIGAM, AK
RAJA, MM
VARAPRASAD, BSDCS
TAKAHASHI, YK
HONO, K
 
Subject HALF-METALLIC FERROMAGNETS
CHEMICAL ORDER
RESISTIVITY
COBALT
 
Description We report the structure, magnetic property, and spin polarization of CoFeMnGe equiatomic quaternary Heusler alloy. The alloy was found to crystallize in the cubic Heusler structure (prototype LiMgPdSn) with considerable amount of DO3 disorder. Thermal analysis result indicated the Curie temperature is about 750 K without any other phase transformation up to melting temperature. The magnetization value was close to that predicted by the Slater-Pauling curve. Current spin polarization of P = 0.70 +/- 0.01 was deduced using point contact andreev reflection measurements. The temperature dependence of electrical resistivity has been fitted in the temperature range of 5-300 K in order to check for the half metallic behavior. Considering the high spin polarization and Curie temperature, this material appears to be promising for spintronic applications. (C) 2014 AIP Publishing LLC.
 
Publisher AMER INST PHYSICS
 
Date 2014-12-28T11:02:52Z
2014-12-28T11:02:52Z
2014
 
Type Article
 
Identifier JOURNAL OF APPLIED PHYSICS, 116(20)
0021-8979
1089-7550
http://dx.doi.org/10.1063/1.4902831
http://dspace.library.iitb.ac.in/jspui/handle/100/16308
 
Language English