Fundamental analysis of the MM'X phosphates and arsenides: A promising series exhibiting potentially high magneto-caloric performances

D. Fruchart, F. Allab, M. Balli, P. De Rango, D. Gignoux, E. K. Hlil, A. Lebouc, S. Miraglia, C. Rillo, J. Tobola, M. G. Shelyapina, N. E. Skryabina, P. Wolfers, R. Zach

Research outputpeer-review

Abstract

The pnictides MM'X, phosphides and arsenides of transition metals can exhibit very peculiar (ferro)magnetic properties. Systematic changes of magnetic ordering occur via first order or metamagnetic transitions, in such a way that marked contribution of entropy with or without magnetoelastic effects are characteristics of these transitions. E.g. for MnFeP1-xAsx compounds, a large magneto-caloric effect (MCE) was realized by application of moderate magnetic fields only. For a long time, we have analyzed the MM'X series for their fundamental characteristics (magnetization, neutron scattering, specific heat, Mössbauer...) as well from systematic band structure calculations. As for the parent series of mono-pnictides MnAs-MnP (M' - vacancy), we better understand the nature of the magnetic forces (polarization, exchange), that mostly proceeds via electronic instabilities. Thus a molecular field model looks not the best approximation to develop MCE analyses.

Original languageEnglish
Title of host publicationAdvanced Materials for Energy Conversion III - A Symposium in Honor of Drs. Gary Sandrock, Louis Schlapbach and Seijirau Suda for Lifetime Achievements in Metal Hydride Research and Development
Pages379
Number of pages1
Volume2006
Publication statusPublished - 2006
Event2006 TMS Annual Meeting - San Antonio
Duration: 12 Mar 200616 Mar 2006
http://www.tms.org/Meetings/Annual-06/AnnMtg06Home.html

Conference

Conference2006 TMS Annual Meeting
CountryUnited States
CitySan Antonio
Period12/03/0616/03/06
Internet address

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Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Cite this

Fruchart, D., Allab, F., Balli, M., De Rango, P., Gignoux, D., Hlil, E. K., ... Zach, R. (2006). Fundamental analysis of the MM'X phosphates and arsenides: A promising series exhibiting potentially high magneto-caloric performances. In Advanced Materials for Energy Conversion III - A Symposium in Honor of Drs. Gary Sandrock, Louis Schlapbach and Seijirau Suda for Lifetime Achievements in Metal Hydride Research and Development (Vol. 2006, pp. 379)