0439529 - FZÚ 2015 RIV DE eng J - Journal Article
Laguta, Valentyn - Stephanovich, V. A. - Savinov, Maxim - Maryško, Miroslav - Kuzian, R. O. - Kondakova, I.V. - Olekhnovich, N.M. - Pushkarev, A.V. - Radyush, Yu.V. - Raevski, I. P. - Raevskaya, S. I. - Prosandeev, S. A.
Superspin glass phase and hierarchy of interactions in multiferroic PbFe_1/2Sb_1/2O₃: an analog of ferroelectric relaxors?
New Journal of Physics. Roč. 16, Nov (2014), "113041-1"-"113041-19". ISSN 1367-2630. E-ISSN 1367-2630
R&D Projects: GA ČR GA13-11473S
Institutional support: RVO:68378271
Keywords : multiferroics * spin glass * superantiferromagnetism * ferroelectrics * relaxors
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.558, year: 2014 ; AIS: 1.982, rok: 2014
DOI: https://doi.org/10.1088/1367-2630/16/11/113041

New perovskite multiferroic PbFe1/2Sb1/2O3 with a high degree (up to 0.9) of chemical ordering and unexpectedly high-temperature magnetic relaxor properties, which can barely be described within concepts of conventional spin glass physics was fabricated. The field-temperature phase diagram of this material, in the extremely wide temperature interval, contains the de Almeida–Thouless-type critical line. This was explained by the creation, at high temperatures of not less than 250 K, of giant superspins (SSs), owing, curiously enough, to the antiferromagnetic superexchange interaction. Analysis of the above complex physical picture was performed with the ab initio calculations and random field approach.
Permanent Link: http://hdl.handle.net/11104/0242794