Impact of Jahn-Teller active Mn3+ on strain effects and phase transitions in Sr0.65Pr0.35MnO3

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dc.contributor.authorTan, TYen_AU
dc.contributor.authorKennedy, BJen_AU
dc.contributor.authorZhou, QDen_AU
dc.contributor.authorLing, CDen_AU
dc.contributor.authorMiiller, Wen_AU
dc.contributor.authorHoward, CJen_AU
dc.contributor.authorCarpenter, MAen_AU
dc.contributor.authorKnight, KSen_AU
dc.date.accessioned2012-06-20T05:27:08Zen_AU
dc.date.available2012-06-20T05:27:08Zen_AU
dc.date.issued2012-03-19en_AU
dc.date.statistics2012-06-20en_AU
dc.description.abstractThe mixed-valence manganite Sr(0.65)Pr(0.35)MnO(3) has been prepared and its crystal and magnetic structure investigated between 7 and 1200 K using high-resolution powder neutron diffraction. The structural and lattice parameter data have been used to determine the octahedral tilting and spontaneous strains associated with the structural, electronic, and magnetic phase transitions. At room temperature, the structure is tetragonal and is characterized by cooperative out-of-phase tilts of the MnO(6) octahedra about the c axis and a large Jahn-Teller-type distortion due to the presence of Mn(3+). The sample exhibits a reversible phase transition from the cubic Pm3m perovskite to a tetragonal I4/mcm structure at 750 K. The Pm (3) over barm <-> I4/mcm phase transition is continuous, and the tetragonal strain, which is dominated by the Jahn-Teller-type distortion of the MnO(6) octahedra, exhibits an unusual e(0.5)(t)alpha(T(c)-T) temperature dependence. At low temperatures, a C-type antiferromagnetic structure develops with a Neel temperature T(N) of 250 K. TheMnmagnetic moment at 7 K is 2.99(2) mu(B)/Mn. The magnetic ordering introduces additional tetragonal strain, and this strain shows the expected quadratic dependence on the magnetic moment at low temperatures. An increase in the octahedral tilt angle at TN demonstrates an effective coupling between the magnetic ordering process and octahedral tilting. © 2012, American Physical Societyen_AU
dc.identifier.articlenumber104107en_AU
dc.identifier.citationTan, T. Y., Kennedy, B. J., Zhou, Q. D., Ling, C. D., Miiller, W., Howard, C. J., Carpenter, M. A. (2012). Impact of Jahn-Teller active Mn3+ on strain effects and phase transitions in Sr0.65Pr0.35MnO3. Physical Review B, 85(10), 104107. doi:10.1103/PhysRevB.85.104107en_AU
dc.identifier.govdoc4319en_AU
dc.identifier.issn1098-0121en_AU
dc.identifier.issue10en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevB.85.104107en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/4351en_AU
dc.identifier.volume85en_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Societyen_AU
dc.subjectPhase transformationsen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectPerovskitesen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectCrystal structureen_AU
dc.subjectJahn-Teller effecten_AU
dc.titleImpact of Jahn-Teller active Mn3+ on strain effects and phase transitions in Sr0.65Pr0.35MnO3en_AU
dc.typeJournal Articleen_AU
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