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

Abstract

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

Citation Formats

Liu, Jindong, Department of Materials Science and Engineering and Materials Research Center, Northwestern University, Evanston, Illinois 60208, Cheng, Xiaomin, E-mail: xmcheng@mail.hust.edu.cn, Tong, Fei, and Miao, Xiangshui. Spin-glass behavior and anomalous magnetoresistance in ferromagnetic Ge{sub 1-x}Fe{sub x}Te epilayer. United States: N. p., 2014. Web. doi:10.1063/1.4890987.
Liu, Jindong, Department of Materials Science and Engineering and Materials Research Center, Northwestern University, Evanston, Illinois 60208, Cheng, Xiaomin, E-mail: xmcheng@mail.hust.edu.cn, Tong, Fei, & Miao, Xiangshui. Spin-glass behavior and anomalous magnetoresistance in ferromagnetic Ge{sub 1-x}Fe{sub x}Te epilayer. United States. doi:10.1063/1.4890987.
Liu, Jindong, Department of Materials Science and Engineering and Materials Research Center, Northwestern University, Evanston, Illinois 60208, Cheng, Xiaomin, E-mail: xmcheng@mail.hust.edu.cn, Tong, Fei, and Miao, Xiangshui. Mon . "Spin-glass behavior and anomalous magnetoresistance in ferromagnetic Ge{sub 1-x}Fe{sub x}Te epilayer". United States. doi:10.1063/1.4890987.
@article{osti_22308537,
title = {Spin-glass behavior and anomalous magnetoresistance in ferromagnetic Ge{sub 1-x}Fe{sub x}Te epilayer},
author = {Liu, Jindong and Department of Materials Science and Engineering and Materials Research Center, Northwestern University, Evanston, Illinois 60208 and Cheng, Xiaomin, E-mail: xmcheng@mail.hust.edu.cn and Tong, Fei and Miao, Xiangshui},
abstractNote = {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.},
doi = {10.1063/1.4890987},
journal = {Journal of Applied Physics},
number = 4,
volume = 116,
place = {United States},
year = {Mon Jul 28 00:00:00 EDT 2014},
month = {Mon Jul 28 00:00:00 EDT 2014}
}