https://doi.org/10.1140/epjb/e2010-00284-1
Structural and magnetic phase transitions in Pr0.15Sr0.85MnO3 at high pressure
1
Frank Laboratory of Neutron Physics, JINR, 141980 Dubna Moscow Reg., Russia
2
Tula State University, 300600 Tula, Russia
3
Institute of Physics, Cukrovarnická 10, 16253 Prague 6, Czech Republic
4
Bayerisches Geoinstitute, University Bayreuth, 95440 Bayreuth, Germany
5
Helmholtz Centre Potsdam, Telegrafenberg, 14473 Potsdam, Germany
6
Laboratoire CRISMAT, ISMRa, Bd du Maréchal Juin, 14050 Caen, France
Corresponding author: a ekich@nf.jinr.ru
Received:
25
May
2010
Revised:
30
August
2010
Published online:
27
September
2010
The crystal and magnetic structures of Pr0.15Sr0.85MnO3 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 dTct/dP = 28(2) K/GPa. The C-type antiferromagnetic (AFM) ground state is formed below TN ≈ 260 K at ambient pressure. While at ambient pressure the structural and magnetic transition temperatures are close, Tct ~ TN, upon compression they become decoupled with TN ≪ Tct due to much weaker TN pressure dependence with coefficient dTN/dP = 3.8(1) K/GPa.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2010