High spin polarization in CoFeMnGe equiatomic quaternary Heusler alloy
- Department of Physics, Indian Institute of Technology Bombay, Mumbai 400076 (India)
- Department of Condensed Matter and Materials Science, Tata Institute of Fundamental Research, Mumbai 400005 (India)
- Defence Metallurgical Research Laboratory, Hyderabad 500058 (India)
- Magnetic Materials Unit, National Institute for Materials Science, Tsukuba 305-0047 (Japan)
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 DO{sub 3} 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.
- OSTI ID:
- 22402694
- Journal Information:
- Journal of Applied Physics, Vol. 116, Issue 20; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CURIE POINT
DIAGRAMS
ELECTRIC CONDUCTIVITY
ELECTRIC CONTACTS
HEUSLER ALLOYS
MAGNETIC PROPERTIES
MAGNETIZATION
MELTING POINTS
PHASE TRANSFORMATIONS
REFLECTION
SPIN ORIENTATION
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
THERMAL ANALYSIS