Home > Publications database > Pressure-induced antiferromagnet-ferromagnet transition and a change in the spin state of Co in $La_{0.5}Ba_{0.5}CoO_{2.8}$ > print

001     205480
005     20250717112741.0
024 7 _ |a 10.1134/S0021364014180052
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024 7 _ |a 0021-3640
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024 7 _ |a 1090-6487
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082 _ _ |a 530
100 1 _ |a Kozlenko, Denis
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245 _ _ |a Pressure-induced antiferromagnet-ferromagnet transition and a change in the spin state of Co in $La_{0.5}Ba_{0.5}CoO_{2.8}$
260 _ _ |a Heidelberg [u.a.]
|c 2014
|b Springer
336 7 _ |a Journal Article
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336 7 _ |a ARTICLE
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500 _ _ |a (c) Pleiades Publishing, Inc. Post referee fulltext in progress. Embargo ab 04 Dec 2014.
520 _ _ |a 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.
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700 1 _ |a Rutkauskas, A. V.
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700 1 _ |a Dang, N. T.
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700 1 _ |a Golosova, N. O.
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700 1 _ |a Kichanov, Sergey
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700 1 _ |a Dubrovinsky, Leonid
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700 1 _ |a Liermann, Hanns-Peter
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700 1 _ |a Morgenroth, Wolfgang
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700 1 _ |a Savenko, B. N.
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773 _ _ |a 10.1134/S0021364014180052
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