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Title: Suppression of magnetostructural transition on GdSiGe thin film after thermal cyclings

The influence of thermal cycling on the microstructure, magnetic phase transition and magnetic entropy change of a Gd 5Si 1.3Ge 2.7 thin film up to 1000 cycles is investigated. The authors found that after 1000 cycles a strong reduction of the crystallographic phase responsible for the magnetostructural transition (Orthorhombic II phase) occurs. We attribute this to the chemical disorder, caused by the large number of expansion/compression cycles that the Orthorhombic II phase undergoes across the magnetostructural transition. The suppression of the magnetostructural transition corresponds to a drastic decrease of the thin film magnetic entropy change. Our results reveal the importance of studying the thermal/magnetic cycles influence on magnetostructural transitions as they can damage a real-life device.
 [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [2] ;  [5] ;  [2] ;  [3] ;  [1] ;  [1] ;  [1]
  1. Univ. of Porto (Portugal). Inst. of Nanoscience and Nanotechnology
  2. Iowa State Univ., Ames, IA (United States). Dept. of Electrical and Computer Engineering
  3. (United States)
  4. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  5. (United States). Division of Materials Science and Engineering
Publication Date:
Report Number(s):
IS-J 9227
Journal ID: ISSN 0040-6090; PII: S0040609016305211
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Thin Solid Films
Additional Journal Information:
Journal Volume: 621; Journal Issue: C; Journal ID: ISSN 0040-6090
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
36 MATERIALS SCIENCE; Thermal cycling; Magnetocaloric effect; Thin films; Microstructure
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1413530