Magnet with Ferromagnetic Nearest-Neighbor and Antiferromagnetic Next-Nearest-Neighbor Exchange Interactions

Szymczak, R.; Szymczak, H.; Kamieniarz, G.; Szukowski, G.; Jaśniewicz-Pacer, K.; Florek, Wojciech; Maltsev, V.; Babonas, G.-J.

doi:10.12693/aphyspola.115.925

Cited by 8 publications

(3 citation statements)

References 30 publications

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“…2(a). The angular phase shift between T ¼ 4 and 10 K in our data is negligible, 1 AE 1°, as it is in the paramagnetic phase for temperatures between 5 and 25 K [37]. Hence, the T ¼ 10 K data reveal the approximate direction of the principal axes of the g tensor perpendicular to b.…”

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confidence: 46%

Field-induced States and Excitations in the Quasicritical Spin- 1/2 Chain Linarite

et al. 2018

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The mineral linarite, PbCuSO_{4}(OH)_{2}, is a spin-1/2 chain with frustrating nearest-neighbor ferromagnetic and next-nearest-neighbor antiferromagnetic exchange interactions. Our inelastic neutron scattering experiments performed above the saturation field establish that the ratio between these exchanges is such that linarite is extremely close to the quantum critical point between spin-multipolar phases and the ferromagnetic state. We show that the predicted quantum multipolar phases are fragile and actually suppressed by a tiny orthorhombic exchange anisotropy and weak interchain interactions in favor of a dipolar fan phase. Including this anisotropy in classical simulations of a nearly critical model explains the field-dependent phase sequence of the phase diagram of linarite, its strong dependence of the magnetic field direction, and the measured variations of the wave vector as well as the staggered and the uniform magnetizations in an applied field.

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confidence: 46%

Field-induced States and Excitations in the Quasicritical Spin- 1/2 Chain Linarite

et al. 2018

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“…Linarite crystallizes in the monoclinic P2 1 /m structure leading to CuO 4 plaquettes, which form Cu-ribbons 23–25 . In zero magnetic fields the spin spiral is established in a plane spanned by crystallographic b -direction and by 27° tilted a -direction below 2.85 K. Magnetic fields up to 10 T induce at least five different magnetic phases 26, 27 .…”

Section: Introductionmentioning

confidence: 99%

Dielectric properties of complex magnetic field induced states in PbCuSO4(OH)2

Mack

Ruff

Nidda

et al. 2017

Sci Rep

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Spin spirals, which coexist with collinear spin order in linarite PbCuSO4(OH)2, indicate electrical polarisation textures of spin-multipolar phases. We derive experimental evidence by a detailed investigation of the magnetic-field dependent dielectric and electric polarization properties at low temperatures. Linarite exhibits a quasi-one-dimensional frustrated S = ½ spin chain, which forms 3D spin-spiral order in zero magnetic field for T < 2.85 K. Recently, due to the monoclinic lattice of linarite with CuO2 ribbon chains, complex magnetic field induced states were found. These spin-multipolar phases, which compete with spin-density waves at low magnetic fields, exist in close vicinity to the transition from the spin spiral into field induced spin polarized state. Via antisymmetric Dzyaloshinskii-Moriya interaction spin-driven ferroelectricity develops in the spin-spirals state. Via electric polarization measurements this allows to prove the transitions into complex magnetic field induced phases. Thorough analyses of the temperature and magnetic field dependent dielectric properties of a naturally grown single crystalline sample provide a detailed (T,H) phase diagrams for the three different crystallographic directions.

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“…2(a). The angular phase shift between T = 4 K and 10 K in our data is negligible, 1 ± 1 • , as it is in the paramagnetic phase for temperatures between 5 and 25 K [36]. Hence, the T = 10 K data reveal the approximate direction of the principal axes of the g tensor perpendicular to b.…”

mentioning

confidence: 42%

Linarite - a quasi-critical J$_1$-J$_2$ chain

Cemal,

Enderle,

Kremer

et al. 2017

Preprint

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The mineral linarite, PbCuSO4(OH)2, is a spin 1/2 chain with frustrating nearest neighbor ferromagnetic and next-nearest neighbor antiferromagnetic exchange interactions. Our inelastic neutron scattering experiments performed above the saturation field establish that the ratio between these exchanges is such that linarite is extremely close to the quantum critical point between spinmultipolar phases and the ferromagnetic state. However, the measured complex magnetic phase diagram depends strongly on the magnetic field direction. The field-dependent phase sequence is explained by our classical simulations of a nearly critical model with tiny orthorhombic exchange anisotropy. The simulations also capture qualitatively the measured variations of the wave vector as well as the staggered and the uniform magnetizations in an applied field.

show abstract

Magnet with Ferromagnetic Nearest-Neighbor and Antiferromagnetic Next-Nearest-Neighbor Exchange Interactions

Cited by 8 publications

References 30 publications

Field-induced States and Excitations in the Quasicritical Spin- 1/2 Chain Linarite

Field-induced States and Excitations in the Quasicritical Spin- 1/2 Chain Linarite

Dielectric properties of complex magnetic field induced states in PbCuSO4(OH)2

Linarite - a quasi-critical J$_1$-J$_2$ chain

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