Spin-lattice effects in selected antiferromagnetic materials (Review Article)

Жерлицын, С.; Yasin, S.; Wosnitza, J.; Zvyagin, A. A.; Андреев, А.В.; Tsurkan, V.

doi:10.1063/1.4865559

Cited by 36 publications

(15 citation statements)

References 68 publications

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“…This change in the lattice at the field-induced phase transition demonstrates that there is a strong magnetoelastic effect. The magnetoelastic coupling in USb2 shown in our data is also seen in many other 5felectron systems, including the uranium monochalcogenides, UCu0.95Ge, and UPt2Si2 [8,16,30]. This magnetoelastic transition could indicate a structural phase transition accompanying the magnetic phase transition, similar to the cubic rock salt to rhombohedral distortion in uranium sulfide (US) as it enters the ferromagnetic state [31,32].…”

Section: Thermal Expansion and Magnetostrictionsupporting

confidence: 76%

Tricritical point of the f -electron antiferromagnet USb2 driven by high magnetic fields

et al. 2017

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In pulsed magnetic fields up to 65T and at temperatures below the Néel transition, our magnetization and magnetostriction measurements reveal a field-induced metamagnetic-like transition that is suggestive of an antiferromagnetic to ferrimagnetic ordering. Our data also suggests a change in the nature of this metamagnetic-like transition from second-to first-orderlike near a tricritical point at T tc ~145K and H c~5 2T. At high fields for H>H c we found a decreased magnetic moment roughly half of the moment determined by neutron powder diffraction. We propose that the decreased moment and lack of saturation at high fields indicate the presence of a field-induced ferrimagnetic state above the tricritical point of the H-T phase diagram for USb 2 .

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Section: Thermal Expansion and Magnetostrictionsupporting

confidence: 76%

Tricritical point of the f -electron antiferromagnet USb2 driven by high magnetic fields

et al. 2017

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“…This artificially constructed sub-lattice of the JT centers is sensitive to external stress and magnetic field giving an opportunity to control the properties of the crystal by the impurity amount, stress and magnetic field. x 0 75) was grown by a flux melt technique in a platinum crucible using a high temperature furnace 68 at the South Ural State University, Russia. As a starting material, the primary reagents of BaCO 3 and Fe 2 O 3 were taken with the respective molar percentage (according to the composition).…”

Section: Discussionmentioning

confidence: 99%

“…The experiments were done at High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, Germany, and at the Institute of Physics and Technology, Ural Federal University, Russia, using setups operating as a frequency variable bridge. The detailed description can be found in 68,69 . The measurements are based on a pulse-echo method and phase-sensitive detection techniques.…”

Section: Discussionmentioning

confidence: 99%

Sub-lattice of Jahn-Teller centers in hexaferrite crystal

Гудков

Сарычев

Жерлицын

et al. 2020

Sci Rep

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A novel type of sub-lattice of the Jahn-teller (Jt) centers was arranged in ti-doped barium hexaferrite Bafe 12 o 19. In the un-doped crystal all iron ions, sitting in five different crystallographic positions, are fe 3+ in the high-spin configuration (S = 5/2) and have a non-degenerate ground state. We show that the electron-donor ti substitution converts the ions to fe 2+ predominantly in tetrahedral coordination, resulting in doubly-degenerate states subject to the ⊗ E e problem of the JT effect. The arranged JT complexes, Fe 2+ o 4 , their adiabatic potential energy, non-linear and quantum dynamics, have been studied by means of ultrasound and terahertz-infrared spectroscopies. the Jt complexes are sensitive to external stress and applied magnetic field. For that reason, the properties of the doped crystal can be controlled by the amount and state of the Jt complexes.

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“…Chromium concentration proved to be N cr = 3.8·10 18 cm −3 . The experiments were carried out at the Dresden High Magnetic Field Laboratory using setup operating as a frequency variable bridge . This technique allows to measure the change of the ultrasound signal attenuation induced by external influence of temperature, magnetic fields, etc.…”

Section: Methodsmentioning

confidence: 99%

Interplay Between Relaxation and Resonance in Ultrasound Attenuation by the Cubic Crystal ZnSe:Cr

Baryshnikov

Averkiev

Берсукер

et al. 2019

Physica Status Solidi (b)

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Resonance ultrasound attenuation, albeit broadened, is observed in doped cubic crystal ZnSe with a part of the Zn 2þ ions substituted by magnetic anisotropic Cr 2þ ions. In the tetrahedral selenium environment the latter form a T term Jahn-Teller (JT) center with a Te JT problem and three equivalent distortions along the three tetragonal axes. In sufficiently strong magnetic fields (B > 4 T) applied along the [001] direction the degeneracy of the ground state is removed, and the ultrasound wave propagating along [110] and polarized along 1 10 ½ (at T ¼ 1.3 K) does not interact with the center, its impurity attenuation being reduced to zero. By comparison, this allows to estimate the contribution of the Cr centers to the attenuation of ultrasound in the ZnSe:Cr crystal in zero magnetic field. The experimental data revealed a strong dependence of the attenuation on the ultrasound frequency, evidencing for the resonance nature of the attenuation: there is no frequency dependence in relaxational attenuation with the relaxation time much larger than the period of the ultrasonic wave. The resonance attenuation is attributed to transitions between the ground state energy levels, split by spin-orbital interaction. The high sensitivity of the resonance absorption on the ultrasound power is also discussed.

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Spin-lattice effects in selected antiferromagnetic materials (Review Article)

Cited by 36 publications

References 68 publications

Tricritical point of the f -electron antiferromagnet USb2 driven by high magnetic fields

Tricritical point of the f -electron antiferromagnet USb2 driven by high magnetic fields

Sub-lattice of Jahn-Teller centers in hexaferrite crystal

Interplay Between Relaxation and Resonance in Ultrasound Attenuation by the Cubic Crystal ZnSe:Cr

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