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Title: Spin-glass behavior and anomalous magnetoresistance in ferromagnetic Ge{sub 1-x}Fe{sub x}Te epilayer

We report that the Ge{sub 1-x}Fe{sub x}Te thin film exhibits spin-glass behavior when the Fe concentration increases to 0.08. A large bifurcation between the zero-field cooling and field cooling temperature-dependent magnetization was observed. The hysteresis loops after zero-field cooling and field cooling show an exchange bias effect. A time-dependent thermoremanent magnetization follows power-law decay, which confirms the existence of spin glass. The anomalous magnetotranport properties present a further evidence for spin-glass behavior and give a freezing temperature T{sub g} ∼ 5 K in the Ge{sub 0.92}Fe{sub 0.08}Te thin film.
Authors:
 [1] ;  [2] ; ; ;  [1]
  1. School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074 (China)
  2. (United States)
Publication Date:
OSTI Identifier:
22308537
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 4; 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; BIFURCATION; COOLING; DECAY; EPITAXY; FERROMAGNETIC MATERIALS; FREEZING; GERMANIUM COMPOUNDS; HYSTERESIS; IRON COMPOUNDS; MAGNETIZATION; MAGNETORESISTANCE; SPIN GLASS STATE; TELLURIUM COMPOUNDS; TEMPERATURE DEPENDENCE; THIN FILMS; TIME DEPENDENCE