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Antiferromagnetic phase transitions in an ordered Pt3Fe(111) film studied by neutron diffraction

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dc.contributor.authorKrishnamurthy, VV
dc.contributor.authorZoto, I
dc.contributor.authorMankey, GJ
dc.contributor.authorRobertson, JL
dc.contributor.authorMaat, S
dc.contributor.authorFullerton, EE
dc.contributor.authorNwagwu, I
dc.contributor.authorAkujieze, JK
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.contributor.otherUnited States Department of Energy (DOE)
dc.contributor.otherOak Ridge National Laboratory
dc.contributor.otherChicago State University
dc.date.accessioned2019-07-16T19:22:56Z
dc.date.available2019-07-16T19:22:56Z
dc.date.issued2004-07-30
dc.description.abstractNeutron diffraction has been used to investigate the critical behavior at the onset of antiferromagnetic phase transitions in a (111) oriented Pt73Fe27 film grown on an a-axis oriented sapphire (alpha-Al2O3) substrate. As in the bulk, there is an antiferromagnetic reorientation transition from the Q(1)=2pi/a(1/2,1/2,0) phase to the Q(2)=2pi/a(1/2,0,0) phase upon cooling. The temperature dependence of the integrated intensity of the (1/2,1/2,0) and the (1/2,0,0) antiferromagnetic Bragg peaks yielded the Neeel temperature of 160.25+/-0.2 K and a reorientation transition temperature of 95+/-0.2 K. The magnetization critical exponent beta is found to be 0.368+/-0.013 for the Q(1) phase and 0.37+/-0.02 for the Q(2) phase. These critical exponents are in excellent agreement with the predictions of the 3d Heisenberg universality class. A comparison of the transition temperatures and the exponents in the film and in single crystal at the same alloy composition is presented.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationKrishnamurthy, V., et al. (2004): Antiferromagnetic Phase Transitions in an Ordered Pt₃ Fe(111) Film Studied by Neutron Diffraction. Physical Review B, 70(2).DOI: https://doi.org/10.1103/PhysRevB.70.024424
dc.identifier.doi10.1103/PhysRevB.70.024424
dc.identifier.orcidhttps://orcid.org/0000-0003-3163-5159
dc.identifier.orcidhttps://orcid.org/0000-0003-3163-5159
dc.identifier.orcidhttps://orcid.org/0000-0002-4725-9509
dc.identifier.urihttp://ir.ua.edu/handle/123456789/5980
dc.languageEnglish
dc.language.isoen_US
dc.publisherAmerican Physical Society
dc.subjectCRITICAL EXPONENTS
dc.subjectMAGNETIC ORDER
dc.subjectMaterials Science, Multidisciplinary
dc.subjectPhysics, Applied
dc.subjectPhysics, Condensed Matter
dc.subjectMaterials Science
dc.subjectPhysics
dc.titleAntiferromagnetic phase transitions in an ordered Pt3Fe(111) film studied by neutron diffractionen_US
dc.typetext
dc.typeArticle

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