Structural and magnetic phase transitions in Pr 0.15 Sr 0.85 MnO 3 at high pressure

D. P. Kozlenko, N. T. Dang, Z. Jirák, S. E. Kichanov (), E. V. Lukin, B. N. Savenko, L. S. Dubrovinsky, C. Lathe and C. Martin

The European Physical Journal B: Condensed Matter and Complex Systems, 2010, vol. 77, issue 3, 407-411

Abstract: The crystal and magnetic structures of Pr 0.15 Sr 0.85 MnO 3 manganite have been studied by means of powder X-ray and neutron diffraction in the temperature range 10–400 K at high external pressures up to 55 and 4 GPa, respectively. A structural phase transition from cubic to tetragonal phase upon compression was observed, with large positive pressure coefficient of transition temperature dT ct /dP=28(2) K/GPa. The C-type antiferromagnetic (AFM) ground state is formed below T N ≈ 260 K at ambient pressure. While at ambient pressure the structural and magnetic transition temperatures are close, T ct ~ T N , upon compression they become decoupled with T N ≪ T ct due to much weaker T N pressure dependence with coefficient dT N /dP=3.8(1) K/GPa. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2010

Date: 2010
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DOI: 10.1140/epjb/e2010-00284-1

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