https://doi.org/10.1140/epjp/s13360-023-04422-2
Regular Article
Metamagnetic and orientational transitions in TbFeO3 orthoferrite: magnetoelectric phase diagrams
Prokhorov General Physics Institute, Russian Academy of Sciences, Vavilov St., 38, 119991, Moscow, Russia
Received:
6
July
2023
Accepted:
29
August
2023
Published online:
19
September
2023
Metamagnetic and orientational phase transitions in the interacting rare-earth and iron subsystems in magnetic fields up to 5 T in the ab-plane at T = 1.85 K are studied in orthoferrite TbFeO3 with magnetic moments of Ising Tb3+ ions lying in the ab-plane of the crystal. The transitions manifest themselves as anomalies (jumps) in the magnetization curves σ(H) for a fixed field orientation or anomalies in the angular dependences of the magnetization, as well as in the field dependences of the electric polarization Pa(H). Phase diagrams are constructed, and magnetic structures are identified, two of which are magnetoelectric. A theoretical model is proposed to describe the observed phase transitions, and a quantitative description of the experimental phase diagrams is given. The characteristic features of the manifestation of magnetoelectric properties in the studied phenomena are established, in particular, a linear increase in polarization in an electric field up to 11 kV/cm, indicating a multidomain polar state in these fields and a memory effect after the electric field is turned off.
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