skip to main content

SciTech ConnectSciTech Connect

Title: High spin polarization in CoFeMnGe equiatomic quaternary Heusler alloy

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.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [4] ; ; ;  [5]
  1. Department of Physics, Indian Institute of Technology Bombay, Mumbai 400076 (India)
  2. (Japan)
  3. Department of Condensed Matter and Materials Science, Tata Institute of Fundamental Research, Mumbai 400005 (India)
  4. Defence Metallurgical Research Laboratory, Hyderabad 500058 (India)
  5. Magnetic Materials Unit, National Institute for Materials Science, Tsukuba 305-0047 (Japan)
Publication Date:
OSTI Identifier:
22402694
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 20; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, 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