| Title |
Phase transitions, polar and magnetic orderings in perovskites of the BiFeO3–BiCrO3 series |
| Authors |
Salak, A. N ; Cardoso, J. P ; Khalyavin, D. D ; Pushkarev, A. V ; Radyush, Yu.V ; Olekhnovich, N. M ; Fertman, E. L ; Fedorchenko, A. V ; Sokol, Denis ; Palaimienė, Edita ; Banys, Jūras ; Salamon, S ; Wende, H ; Feher, A ; Čižmár, E |
| DOI |
10.1016/j.jpcs.2026.113621 |
| Full Text |
|
| Is Part of |
Journal of physics and chemistry of solids.. Oxford : Elsevier Ltd. 2026, vol. 213, art. no. 113621, p. [1-11].. ISSN 0022-3697. eISSN 1879-2553 |
| Keywords [eng] |
conversion polymorphism ; dielectric dispersion ; G-type antiferromagnetic ; high-pressure synthesis ; oxygen octahedral tilting |
| Abstract [eng] |
The high-pressure stabilized perovskite phases of the BiFe1-xCrxO3 solid solutions (0 ≤ x ≤ 1) were studied in respect of their stability at ambient pressure, phase coexistence and phase transitions as well as dielectric properties and magnetic behaviour. The as prepared phases with x ≤ 0.50 are the rhombohedral R3c. In the compositional range of 0.55 ≤ x ≤ 0.90, the solid solutions are the antipolar orthorhombic Pnma, while the monoclinic C2/c phase is formed when x ≥ 0.95. Upon heating, all the studied compositions exhibit structural transition into a high-temperature non-polar orthorhombic Pnma modification. The transition is reversible; the only exception is the case of the solid solution with x = 0.55, which transforms to the two-phase mixture (R3c + antipolar Pnma) upon cooling. The BiFe1-xCrxO3 ceramics demonstrate high dielectric constant yet a relatively high dielectric loss, which grows with increasing temperature. Dielectric dispersion likely caused by ferroelectric domain was observed and activation energy was estimated as a function of chromium content. The composition with x = 0.95 shows a spin re-orientation transition, which is suppressed when x ≤ 0.90. In the Cr-rich compositional range, a magnetization reversal effect below the Néel temperature was observed. |
| Published |
Oxford : Elsevier Ltd |
| Type |
Journal article |
| Language |
English |
| Publication date |
2026 |
| CC license |
|
