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Temperature- and magnetic-field-induced phase transitions in Fe-rich FePt alloys

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Temperature- and magnetic-field-induced phase transitions in Fe-rich FePt alloys

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dc.contributor.author Rong, Chuanbing
dc.contributor.author Liu, J. Ping
dc.date.accessioned 2010-08-10T18:15:51Z
dc.date.available 2010-08-10T18:15:51Z
dc.date.issued 2007-06-01 en_US
dc.identifier.citation Appl. Phys. Lett. 90 222504 (2007) en_US
dc.identifier.issn 0003-6951 (print)
dc.identifier.uri http://hdl.handle.net/10106/4994
dc.description.abstract Structural and magnetic properties of the FexPt100-x (x=78–88) alloys have been investigated. It is found that for all of the investigated compositions, a phase transition occurs from the disordered γ phase to the ordered α phase during cooling, while a reverse process takes place during heating. Moreover, magnetic fields also induce a phase transition from the γ phase to the α phase near the transition temperature. The temperature- and magnetic-field-induced phase transitions give rise to a huge negative thermal expansion and thus a giant magnetic entropy change (up to 39.8 J/kg K for the alloy with x=79). The contribution of the magnetic field induced phase transition to the total magnetic entropy change is estimated to be around 20%–25%. en_US
dc.language.iso en_US en_US
dc.publisher American Institute of Physics en_US
dc.subject magnetic transition temperature en_US
dc.subject iron alloys en_US
dc.subject platinum alloys en_US
dc.subject cooling en_US
dc.subject heat treatment en_US
dc.subject thermal expansion en_US
dc.subject entropy en_US
dc.subject magnetocaloric effects en_US
dc.subject ferromagnetic materials en_US
dc.title Temperature- and magnetic-field-induced phase transitions in Fe-rich FePt alloys en_US
dc.type Article en_US
dc.publisher.department Department of Physics, The University of Texas at Arlington en_US
dc.identifier.externalLink http://link.aip.org/link/APPLAB/v90/i22/p222504/s1 en_US
dc.identifier.externalLinkDescription External link to the published article en_US

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