%0 Journal Article
%A Kozlenko, Denis
%A Rutkauskas, A. V.
%A Dang, N. T.
%A Golosova, N. O.
%A Kichanov, Sergey
%A Dubrovinsky, Leonid
%A Liermann, Hanns-Peter
%A Morgenroth, Wolfgang
%A Savenko, B. N.
%T Pressure-induced antiferromagnet-ferromagnet transition and a change in the spin state of Co in La<sub>0.5</sub>Ba<sub>0.5</sub>CoO<sub>2.8</sub>
%J JETP letters
%V 100
%N 6
%@ 1090-6487
%C Heidelberg [u.a.]
%I Springer
%M PUBDB-2015-00044
%P 380 - 384
%D 2014
%Z (c) Pleiades Publishing, Inc. Post referee fulltext in progress. Embargo ab 04 Dec 2014.
%X The crystal and magnetic structures of anion-deficit cobaltite La0.5Ba0.5CoO2.8 have been studied by theX-ray and neutron diffraction methods at high pressures up to 30 and 6 GPa, respectively. A structure transi-tion from the cubic phase with symmetry Pm m to the tetragonal phase with symmetry P4/mmm has beenobserved in this compound at P ≈ 3 GPa. It is accompanied by the change of the ground antiferromagneticstate of the G type to the ferromagnetic state because of a change in the electronic configuration of Co3+ ions.Possible mechanisms of the observed magnetic phase transition, as well as the role of the superexchange inter-actions between Co3+ ions in various spin states in the formation of magnetic properties, have been discussed.Pressure induced change in the magnetic state of La0.5Ba0.5CoO2.8 significantly differs from related stoichi-ometric compounds La0.5A0.5CoO3.0 (A = Sr, Ca), where the ground ferromagnetic state is formed and thesign of the pressure dependence of the Curie temperature depends on the element A.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000345965800006
%R 10.1134/S0021364014180052
%U https://bib-pubdb1.desy.de/record/205480