Magnetic field induced phases and spin Hamiltonian in Cs2CoBr4

L. Facheris; S. D. Nabi; K. Yu Povarov; Z. Yan; A. Glezer Moshe; U. Nagel; T. Rõõm; A. Podlesnyak; E. Ressouche; K. Beauvois; J. R. Stewart; P. Manuel; D. Khalyavin; F. Orlandi; A. Zheludev

doi:10.1103/PhysRevB.109.104433

Magnetic field induced phases and spin Hamiltonian in Cs2CoBr4

L. Facheris, S. D. Nabi, K. Yu Povarov, Z. Yan, A. Glezer Moshe, U. Nagel, T. Rõõm, A. Podlesnyak, E. Ressouche, K. Beauvois, J. R. Stewart, P. Manuel, D. Khalyavin, F. Orlandi, A. Zheludev

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Abstract

Magnetic structures and spin excitations are studied across the phase diagram of the geometrically frustrated S=3/2 quantum antiferromagnet Cs2CoBr4 in magnetic fields applied along the magnetic easy axis, using neutron diffraction, inelastic neutron scattering, and terahertz absorption spectroscopy. The data are analyzed, where appropriate, using extended SU(4) linear spin wave theory. A minimal magnetic Hamiltonian is proposed based on measurements in the high-field paramagnetic state. It deviates considerably from the previously considered models. Additional dilatometry experiments highlight the importance of magnetoelastic coupling in this system.

Original language	English
Article number	104433
Journal	Physical Review B
Volume	109
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.109.104433
State	Published - Mar 1 2024

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10.1103/PhysRevB.109.104433

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abstract = "Magnetic structures and spin excitations are studied across the phase diagram of the geometrically frustrated S=3/2 quantum antiferromagnet Cs2CoBr4 in magnetic fields applied along the magnetic easy axis, using neutron diffraction, inelastic neutron scattering, and terahertz absorption spectroscopy. The data are analyzed, where appropriate, using extended SU(4) linear spin wave theory. A minimal magnetic Hamiltonian is proposed based on measurements in the high-field paramagnetic state. It deviates considerably from the previously considered models. Additional dilatometry experiments highlight the importance of magnetoelastic coupling in this system.",

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T1 - Magnetic field induced phases and spin Hamiltonian in Cs2CoBr4

AU - Facheris, L.

AU - Nabi, S. D.

AU - Povarov, K. Yu

AU - Yan, Z.

AU - Moshe, A. Glezer

AU - Nagel, U.

AU - Rõõm, T.

AU - Podlesnyak, A.

AU - Ressouche, E.

AU - Beauvois, K.

AU - Stewart, J. R.

AU - Manuel, P.

AU - Khalyavin, D.

AU - Orlandi, F.

AU - Zheludev, A.

PY - 2024/3/1

Y1 - 2024/3/1

N2 - Magnetic structures and spin excitations are studied across the phase diagram of the geometrically frustrated S=3/2 quantum antiferromagnet Cs2CoBr4 in magnetic fields applied along the magnetic easy axis, using neutron diffraction, inelastic neutron scattering, and terahertz absorption spectroscopy. The data are analyzed, where appropriate, using extended SU(4) linear spin wave theory. A minimal magnetic Hamiltonian is proposed based on measurements in the high-field paramagnetic state. It deviates considerably from the previously considered models. Additional dilatometry experiments highlight the importance of magnetoelastic coupling in this system.

AB - Magnetic structures and spin excitations are studied across the phase diagram of the geometrically frustrated S=3/2 quantum antiferromagnet Cs2CoBr4 in magnetic fields applied along the magnetic easy axis, using neutron diffraction, inelastic neutron scattering, and terahertz absorption spectroscopy. The data are analyzed, where appropriate, using extended SU(4) linear spin wave theory. A minimal magnetic Hamiltonian is proposed based on measurements in the high-field paramagnetic state. It deviates considerably from the previously considered models. Additional dilatometry experiments highlight the importance of magnetoelastic coupling in this system.

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DO - 10.1103/PhysRevB.109.104433

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Magnetic field induced phases and spin Hamiltonian in Cs2CoBr4

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