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  • Cedervall, JohanUppsala universitet,Oorganisk kemi (author)

Magnetocaloric effect in Fe2 P: Magnetic and phonon degrees of freedom

  • Article/chapterEnglish2019

Publisher, publication year, extent ...

  • 2019
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:e6a150a6-9de6-4ad0-b497-e421148eae4a
  • https://research.chalmers.se/publication/510836URI
  • https://research.chalmers.se/publication/510818URI
  • https://doi.org/10.1103/PhysRevB.99.174437DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-387585URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Devices based on magnetocaloric materials provide great hope for environmentally friendly and energy efficient cooling that does not rely on the use of harmful gasses. Fe2P based compounds are alloys that have shown great potential for magnetocaloric devices. The magnetic behavior in Fe2P is characterized by a strong magnetocaloric effect that coexists with a first-order magnetic transition (FOMT). Neutron diffraction and inelastic scattering, Mossbauer spectroscopy, and first-principles calculations have been used to determine the structural and magnetic state of Fe2P around the FOMT. The results reveal that ferromagnetic moments in the ordered phase are perturbed at the FOMT such that the moments cant away from the principle direction within a small temperature region. The acoustic-phonon modes reveal a temperature-dependent nonzero energy gap in the magnetically ordered phase that falls to zero at the FOMT. The interplay between the FOMT and the phonon energy gap indicates hybridization between magnetic modes strongly affected by spin-orbit coupling and phonon modes leading to magnon-phonon quasiparticles that drive the magnetocaloric effect.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Andersson, Mikael,1988Chalmers tekniska högskola,Chalmers University of Technology,Uppsala universitet,Uppsala University(Swepub:cth)anmikael (author)
  • Delczeg-Czirjak, Erna KrisztinaUppsala universitet,Materialteori(Swepub:uu)ernde783 (author)
  • Iusan, DianaUppsala universitet,Materialteori(Swepub:uu)diius030 (author)
  • Pereiro, ManuelUppsala universitet,Materialteori(Swepub:uu)manpe712 (author)
  • Roy, P.Radboud Universiteit,Radboud University,Radboud Univ Nijmegen, Inst Mol & Mat, Heyendaalseweg 135, NL-6525 AJ Nijmegen, Netherlands (author)
  • Ericsson, ToreUppsala universitet,Materialfysik(Swepub:uu)toreeric (author)
  • Häggström, LennartUppsala universitet,Materialfysik(Swepub:uu)lennhagg (author)
  • Lohstroh, W.Technische Universität München (TUM),Technical University of Munich (TUM),Tech Univ Munich, Heinz Maier Leibnitz Zentrum MLZ, Garching Bei Munchen, Lichtenbergstr, D-185748 Garching, Germany (author)
  • Mutka, H.Institut Laue-Langevin,Inst Laue Langevin, BP 156, F-38042 Grenoble 9, France (author)
  • Sahlberg, Martin,1981-Uppsala universitet,Oorganisk kemi(Swepub:uu)masah021 (author)
  • Nordblad, PerUppsala universitet,Fasta tillståndets fysik(Swepub:uu)pno26208 (author)
  • Deen, P. P.Köpenhamns universitet,University of Copenhagen,European Spallation Source (ESS),European Spallat Source ESS ERIC, Box 176, SE-22100 Lund, Sweden;Univ Copenhagen, Nanosci Ctr, Niels Bohr Inst, DK-2100 Copenhagen O, Denmark (author)
  • Andersson, MartinUppsala universitet,Mikrosystemteknik,Chalmers Univ Technol, Dept Chem & Chem Engn, SE-41296 Gothenburg, Sweden(Swepub:uu)maran392 (author)
  • Uppsala universitetOorganisk kemi (creator_code:org_t)

Related titles

  • In:Physical Review B99:172469-99692469-9950

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