Abstract:
The ground state of a classical ferromagnet with the noncollinear single-ion anisotropy axes of the two sublattices and antisymmetric and anisotropic symmetric exchanges between the sublattices has been considered in a magnetic field applied in the hard magnetic directions of the crystal. The threshold conditions on the anisotropic interactions parameters determined the ground state among the three possible magnetic phases have been obtained. Depended on the type of the ground state and field direction the transition between the phases occurs as a phase transition first or second order. The value of the antisymmetric exchange above that the reorientation between two noncollinear phases is terminated by the second order phase transition depends on the angle between the local easy axes and the value of single-ion anisotropy. The field dependences of the magnetization and susceptibility have been calculated for the different ground states. The comparison with the results of the magnetic measurements in the highly anisotropic ferromagnet PbMnBO4 has been made.
This study was supported by the Russian Foundation for Basic Research and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project no. 20-42-240006 "Synthesis and Study of Pb2+ и Bi3+-Containing Oxide Single Crystals with Partial Substitution in One of the Subsystems: Magnetic Structures and Magnetodielectric Effect".
Citation:
S. N. Martynov, “Ground state of a two-sublattice anisotropic ferromagnet in a magnetic field”, Fizika Tverdogo Tela, 63:8 (2021), 1090–1097; Phys. Solid State, 63:8 (2021), 1253–1261
\Bibitem{Mar21}
\by S.~N.~Martynov
\paper Ground state of a two-sublattice anisotropic ferromagnet in a magnetic field
\jour Fizika Tverdogo Tela
\yr 2021
\vol 63
\issue 8
\pages 1090--1097
\mathnet{http://mi.mathnet.ru/ftt8068}
\crossref{https://doi.org/10.21883/FTT.2021.08.51159.056}
\elib{https://elibrary.ru/item.asp?id=46345439}
\transl
\jour Phys. Solid State
\yr 2021
\vol 63
\issue 8
\pages 1253--1261
\crossref{https://doi.org/10.1134/S1063783421080199}
Linking options:
https://www.mathnet.ru/eng/ftt8068
https://www.mathnet.ru/eng/ftt/v63/i8/p1090
This publication is cited in the following 7 articles:
S. N. Martynov, “Anisotropic exchange interactions in a ferromagnet PbMnBO4”, JETP Letters, 119:11 (2024), 879–884
S. N. Krylova, “Calculation of the Phonon Spectrum of PbMnBO4 Crystal Using Density Functional Theory”, Crystallogr. Rep., 68:5 (2023), 788
S. N. Krylova, “Calculation of the Phonon Spectrum of PbMnBO4 Crystal Using Density Functional Theory”, Kristallografiya, 68:5 (2023), 799
S.N. Martynov, “Orbital structure and magnetic phase diagram of the four-sublattice ferromagnet PbMnBO4”, Journal of Magnetism and Magnetic Materials, 570 (2023), 170520
S. N. Martynov, “Ground state of the orbitally ordered PbMnBO4 ferromagnet”, JETP Letters, 115:11 (2022), 679–684
M. A. Prosnikov, M. E. Bal, M. I. Kolkov, A. I. Pankrats, R. V. Pisarev, P. C. M. Christianen, “Subterahertz and terahertz spin and lattice dynamics of the insulating ferromagnet
PbMnBO4”, Phys. Rev. Research, 4:1 (2022)
A. M. Vorotynov, A. I. Pankrats, M. I. Kolkov, “EPR Study of the Single-Ion Magnetic Anisotropy of the Fe3+ Ion in a Diamagnetic PbGaBO4 Crystal”, J. Exp. Theor. Phys., 133:5 (2021), 574
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