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Title: Temperature dependence of the magnetostriction in polycrystalline PrFe{sub 1.9} and TbFe{sub 2} alloys: Experiment and theory

A remarkable magnetostriction λ{sub 111} as large as 6700 ppm was found at 70 K in PrFe{sub 1.9} alloy. This value is even larger than the theoretical maximum of 5600 ppm estimated by the Steven's equivalent operator method. The temperature dependence of λ{sub 111} for PrFe{sub 1.9} and TbFe{sub 2} alloys follows well with the single-ion theory rule, which yields giant estimated λ{sub 111} values of about 8000 and 4200 ppm for PrFe{sub 1.9} and TbFe{sub 2} alloys, respectively, at 0 K. The easy magnetization direction of PrFe{sub 1.9} changes from [111] to [100] as temperature decreases, which leads to the abnormal decrease of the magnetostriction λ. The rare earth sublattice moment increases sharply in PrFe{sub 1.9} alloy with decreasing temperature, resulting in the remarkably largest estimated value of λ{sub 111} at 0 K according to the single-ion theory.
Authors:
 [1] ;  [2] ; ; ; ; ; ; ;  [1] ;  [3]
  1. National Laboratory of Microstructures and Department of Physics, Institute of Materials Engineering, Nanjing University, Nanjing 210093 (China)
  2. (China)
  3. High Magnetic Field Laboratory, Chinese Academy of Sciences (CAS), Hefei, Anhui 230031 (China)
Publication Date:
OSTI Identifier:
22273471
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; 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; CALCULATION METHODS; CRYSTAL STRUCTURE; IRON ALLOYS; MAGNETIZATION; MAGNETOSTRICTION; POLYCRYSTALS; PRASEODYMIUM ALLOYS; TEMPERATURE DEPENDENCE; TERBIUM ALLOYS