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Title: Magnetic behaviors in melt spun Fe{sub 52−x}Mn{sub 23+x}Ga{sub 25} (x = 0–3) ribbons

The effect of volume fraction of B2-type ferromagnetic (FM) phase on magnetic behavior of melt-spun Fe{sub 52−x}Mn{sub 23+x}Ga{sub 25} (x = 0, 1, 2, and 3) ribbons has been investigated. X-ray diffraction (XRD) results show that the volume fraction of the B2 phase is decreased, accompanied by the increased antiferromagnetic (AFM) fcc phase, with increasing x. The magnetization isotherms of these ribbons at different temperatures demonstrate that there exists a critical field H{sub CR} from AFM to FM state, and the H{sub CR} decreases and vanishes finally with increasing temperature. High exchange bias field (H{sub EB}) at 10 K through a cooling field at H{sub CR} from 300 K could be found and correlated to the volume fraction of B2-type FM phase. Both H{sub CR} and H{sub EB} are increased with decreasing the amount of B2-type FM phase. The H{sub CR} is increased from 20 kOe for x = 0 to 50 kOe for x = 3, and H{sub EB} is increased from 0.9 kOe for x = 0 to 2.5 kOe for x = 2. The latter phenomenon might be attributed to the change of exchange interactions at FM/AFM interfaces due to the change of proportion of FM and AFM phase at low temperature.
Authors:
; ;  [1] ;  [1] ;  [2] ;  [3] ;  [1] ;  [2]
  1. Department of Physics, National Chung Cheng University, Ming-Hsiung, Chia-Yi 62102, Taiwan (China)
  2. (China)
  3. Department of Applied Physics, Tunghai University, Taichung 40704, Taiwan (China)
Publication Date:
OSTI Identifier:
22273847
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; 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; ANTIFERROMAGNETIC MATERIALS; ANTIFERROMAGNETISM; ATOMIC FORCE MICROSCOPY; CONCENTRATION RATIO; CRITICAL FIELD; EXCHANGE INTERACTIONS; FCC LATTICES; GALLIUM; INTERFACES; INTERMETALLIC COMPOUNDS; IRON; ISOTHERMS; MAGNETIZATION; MANGANESE; TEMPERATURE DEPENDENCE; X-RAY DIFFRACTION