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Title: Discovery and characterization of magnetism in sigma-phase intermetallic Fe-Re compounds

Abstract

Systematic experimental studies (vibrating sample magnetometry) supported by theoretical calculations (electronic structure by spin self-consistent Korringa-Kohn-Rostoker Green's function method) were performed on a series of intermetallic sigma-phase Fe{sub 100−x}Re{sub x} (x = 43–53) compounds. All investigated samples exhibit magnetism with an ordering temperature ranging between ∼65 K for x = 43 and ∼23 K for x = 53. The magnetism was revealed to be itinerant and identified as a spin-glass (SG) possibly having a re-entrant character. The SG was found to be heterogeneous, viz., two regimes could be distinguished as far as irreversibility in temperature dependence of magnetization is concerned: (1) of a weak irreversibility and (2) of a strong one. According to the theoretical calculations, the main contribution to the magnetism comes from Fe atoms occupying all five sub lattices, while Re atoms have rather small magnetic moments. However, the calculated average magnetic moments highly (ferromagnetic ordering model) or moderately (antiparallel ordering model) overestimate the experimental data.

Authors:
;  [1];  [2]
  1. AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, PL-30-059 Krakow (Poland)
  2. Institute of Solid State Physics, Vienna University of Technology, A-1040 Wien (Austria)
Publication Date:
OSTI Identifier:
22402627
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 116; Journal Issue: 18; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATOMS; ELECTRONIC STRUCTURE; MAGNETIC MOMENTS; MAGNETISM; MAGNETIZATION; RHENIUM COMPOUNDS; SPIN; SPIN GLASS STATE; TEMPERATURE DEPENDENCE

Citation Formats

Cieślak, J., E-mail: Cieslak@fis.agh.edu.pl, Dubiel, S. M., Tobola, J., and Reissner, M. Discovery and characterization of magnetism in sigma-phase intermetallic Fe-Re compounds. United States: N. p., 2014. Web. doi:10.1063/1.4900853.
Cieślak, J., E-mail: Cieslak@fis.agh.edu.pl, Dubiel, S. M., Tobola, J., & Reissner, M. Discovery and characterization of magnetism in sigma-phase intermetallic Fe-Re compounds. United States. https://doi.org/10.1063/1.4900853
Cieślak, J., E-mail: Cieslak@fis.agh.edu.pl, Dubiel, S. M., Tobola, J., and Reissner, M. 2014. "Discovery and characterization of magnetism in sigma-phase intermetallic Fe-Re compounds". United States. https://doi.org/10.1063/1.4900853.
@article{osti_22402627,
title = {Discovery and characterization of magnetism in sigma-phase intermetallic Fe-Re compounds},
author = {Cieślak, J., E-mail: Cieslak@fis.agh.edu.pl and Dubiel, S. M. and Tobola, J. and Reissner, M.},
abstractNote = {Systematic experimental studies (vibrating sample magnetometry) supported by theoretical calculations (electronic structure by spin self-consistent Korringa-Kohn-Rostoker Green's function method) were performed on a series of intermetallic sigma-phase Fe{sub 100−x}Re{sub x} (x = 43–53) compounds. All investigated samples exhibit magnetism with an ordering temperature ranging between ∼65 K for x = 43 and ∼23 K for x = 53. The magnetism was revealed to be itinerant and identified as a spin-glass (SG) possibly having a re-entrant character. The SG was found to be heterogeneous, viz., two regimes could be distinguished as far as irreversibility in temperature dependence of magnetization is concerned: (1) of a weak irreversibility and (2) of a strong one. According to the theoretical calculations, the main contribution to the magnetism comes from Fe atoms occupying all five sub lattices, while Re atoms have rather small magnetic moments. However, the calculated average magnetic moments highly (ferromagnetic ordering model) or moderately (antiparallel ordering model) overestimate the experimental data.},
doi = {10.1063/1.4900853},
url = {https://www.osti.gov/biblio/22402627}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 18,
volume = 116,
place = {United States},
year = {Fri Nov 14 00:00:00 EST 2014},
month = {Fri Nov 14 00:00:00 EST 2014}
}