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Anomalous elastic hardening in Fe-Co alloys at high temperature
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2014 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 89, no 18, 184107- p.Article in journal (Refereed) Published
Abstract [en]

The elastic moduli of Fe1-cCoc (c <= 0.2) alloys are found to decrease strongly with increasing temperature, but show very weak alloying effects for both low-temperature ferromagnetic and high-temperature paramagnetic states. For temperatures slightly below and around the Curie temperature of Fe, Co addition significantly increases the elastic moduli. The variation of the tetragonal shear elastic constant upon 20% Co addition increases from a small negative value to more than 135% as the temperature rises from 0 to 1200 K. The expected elastic softening in the case of Al doping is not confirmed. Both anomalous trends are ascribed to the interplay between intrinsic chemical effects, magnetism, and temperature.

Place, publisher, year, edition, pages
2014. Vol. 89, no 18, 184107- p.
National Category
Condensed Matter Physics
URN: urn:nbn:se:uu:diva-227255DOI: 10.1103/PhysRevB.89.184107ISI: 000335912400005OAI: oai:DiVA.org:uu-227255DiVA: diva2:731741
Available from: 2014-07-02 Created: 2014-06-24 Last updated: 2014-07-02Bibliographically approved

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Johansson, BörjeVitos, Levente
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