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  Strong magnetoelastic effect in CeCo1-xFexSi as Néel order is suppressed

Correa, V. F., Villagrán Asiares, A. G., Betancourth, D., Encina, S., Pedrazzini, P., Cornaglia, P. S., et al. (2019). Strong magnetoelastic effect in CeCo1-xFexSi as Néel order is suppressed. Physical Review B, 100(18): 184409, pp. 1-5. doi:10.1103/PhysRevB.100.184409.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-4FBB-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-4FBD-F
Genre: Journal Article

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 Creators:
Correa, V. F.1, Author
Villagrán Asiares, A. G.1, Author
Betancourth, D.1, Author
Encina, S.1, Author
Pedrazzini, P.1, Author
Cornaglia, P. S.1, Author
García, D. J.1, Author
Sereni, J. G.1, Author
Maiorov, B.1, Author
Caroca-Canales, N.2, Author              
Geibel, C.3, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
3Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              

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Free keywords: Cerium alloys; Cobalt alloys; Iron alloys; Magnetostriction; Silicon alloys; Temperature; X ray absorption spectroscopy, Antiferromagnetic orderings; Critical concentration; Kondo screening; Low temperatures; Magnetic orders; Magnetoelastic effects; Magnetostrictive effect; Nonmagnetics, Nitrogen compounds
 Abstract: A very strong magnetoelastic effect in the CeCo1-xFexSi alloys is reported. The strength of the magnetostrictive effect can be tuned upon changing x. The moderate low-temperature linear magnetostriction observed at low Fe concentrations becomes very large (ΔLL16T,2K=3×10-3) around the critical concentration xc≈0.23 at which the long-range antiferromagnetic order vanishes. Upon increasing doping through the nonmagnetic region (x>xc), the magnetostriction strength gradually weakens again. The interplay between magnetic order and the Kondo screening appears to cause an enhanced valence susceptibility slightly changing the Ce ions valence, ultimately triggering the large magnetostriction observed around the critical concentration. Previous studies of the evolution of the lattice parameters with x as well as magnetization and x-ray absorption spectroscopy measurements support this hypothesis. © 2019 American Physical Society.

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Language(s): eng - English
 Dates: 2019-11-112019-11-11
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1103/PhysRevB.100.184409
 Degree: -

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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 100 (18) Sequence Number: 184409 Start / End Page: 1 - 5 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008