Magnetic field-induced transitions in geometrically frustrated<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi mathvariant="normal">Co</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">V</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>8</mml:mn></mml:msub></mml:mrow></mml:math>single crystal

Szymcżak, R.; Баран, М.; Diduszko, R.; Fink‐Finowicki, J.; Gutowska, M.; Szewczyk, A.; Szymczak, H.

doi:10.1103/physrevb.73.094425

Cited by 59 publications

(94 citation statements)

References 27 publications

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“…Of particular interest has been magnetism of the two-dimensional kagome staircase M 3 V 2 O 8 (M ¼ Ni, Co, Mn) because of the concurrent presence of both highly frustrated lattice and strong quantum fluctuations. This system displays a rich, highly anisotropic, phase diagram [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Even though these materials have identical crystal symmetry and similar structural parameters, their magnetic properties are quite different.…”

Section: Introductionmentioning

confidence: 99%

Magnetic anisotropy in geometrically frustrated kagome staircase lattices

Szymczak

Aleshkevych

Adams

et al. 2009

Journal of Magnetism and Magnetic Materials

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Section: Introductionmentioning

confidence: 99%

Magnetic anisotropy in geometrically frustrated kagome staircase lattices

Szymczak

Aleshkevych

Adams

et al. 2009

Journal of Magnetism and Magnetic Materials

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“…In zero field, CVO displays four different incommensurate and commensurate antiferromagnetic phases below 11.2 K that ultimately terminate in a ferromagnetic ground state below T ∼6.2 K. All five of the magnetic states display a preferred direction of the spins parallel to the a-axis, the easy axis of this system. The phase diagram is highly anisotropic, and the susceptibility in the ferromagnetic state along the easy a-axis is almost two orders of magnitude larger than that along the hard b-axis [16,24,28]. The susceptibility along c is intermediate between that along a and b, and we therefore expect CVO to approximate a quasi-2D Ising system.…”

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confidence: 99%

“…The low temperature phase diagram of CVO has been studied by neutron diffraction in both zero [16][17][18][19] and finite applied magnetic fields [20,21], by optical spectroscopy [22,23], heat capacity and magnetization [12,24] as well as µSR [25] and NMR [26,27] measurements. In zero field, CVO displays four different incommensurate and commensurate antiferromagnetic phases below 11.2 K that ultimately terminate in a ferromagnetic ground state below T ∼6.2 K. All five of the magnetic states display a preferred direction of the spins parallel to the a-axis, the easy axis of this system.…”

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confidence: 99%

Quantum phase transitions and decoupling of magnetic sublattices in the quasi-two-dimensional Ising magnetCo3V2O8in a transverse magnetic field

et al. 2015

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The application of a magnetic field transverse to the easy axis, Ising direction in the quasi-two dimensional Kagome staircase magnet, Co3V2O8, induces three quantum phase transitions at low temperatures, ultimately producing a novel high field polarized state, with two distinct sublattices. New time-of-flight neutron scattering techniques, accompanied by large angular access, high magnetic field infrastructure allow the mapping of a sequence of ferromagnetic and incommensurate phases and their accompanying spin excitations. At least one of the transitions to incommensurate phases at µ0Hc1 ∼ 6.25 T and µ0Hc2 ∼ 7 T is discontinuous, while the final quantum critical point at µ0Hc3 ∼ 13 T is continuous.

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“…It is already known that at low temperatures, the c-axis field can induce magnetic transitions from the zero-field CF state to an intermediate ICAF phase and then to the paramagnetic state at about 1 and 5 T, respectively. 1,16,19 It is also a rather common phenomenon in the magnetic materials that the phonons can be strongly scattered by the magnetic excitations populated at the critical fields of various field-induced transitions. 10,[25][26][27]29 The strong suppression of κ at these two critical fields is also evidenced in the κ(T ) data in 1.5 and 5.25 T fields, as shown in Fig.…”

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confidence: 99%

“…The presence of two different Co 2+ sites along with competing interactions such as the single-ion anisotropy, the nearest-neighbor and the next nearest-neighbor exchanges, and Dzyaloshinskii-Moriya (DM) interactions lead to fascinating magnetic behaviors at low temperatures. [1][2][3][16][17][18][19][20]22,23 In zero field, there are successive magnetic transitions from the paramagnetic (PM) to incommensurate antiferromagnetic (ICAF), commensurate antiferromagnetic (CAF) and commensurate ferromagnetic phases (CF). 1,19 The geometric frustration results in an antiferromagnetic order of Co 2+ spins at a rather low temperature of T N = 11.4 K. 2,16,18 At T N , only the Co 2+ spins locating in the spine site order antiferromagnetically along the a axis.…”

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Heat switch effect in an antiferromagnetic insulator Co3V2O8

Zhao

et al. 2016

Applied Physics Letters

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We report a heat switch effect in single crystals of an antiferromagnet Co 3 V 2 O 8 , that is, the thermal conductivity (κ) can be changed with magnetic field in an extremely large scale. Due to successive magnetic phase transitions at 12-6 K, the zero-field κ(T ) displays a deep minimum at 6.7 K and rather small magnitude at low temperatures. Both the temperature and field dependencies of κ demonstrate that the phonons are strongly scattered at the regime of magnetic phase transitions. Magnetic field can suppress magnetic scattering effect and significantly recover the phonon thermal conductivity. In particular, a 14 T field along the a axis increases the κ at 7.5 K up to 100 times. For H c, the magnitude of κ can be suppressed down to ∼ 8% at some field-induced transition and can be enhanced up to 20 times at 14 T. The present results demonstrate that it is possible to design a kind of heat switch in the family of magnetic materials. Heat switches are devices that switch as needed between roles of good thermal conductors and good thermal insulators. They have wide and important applications in not only the cryogenics but also the deep space detectors, space coolers and spacecrafts. 1-4 A famous heat switch used in cryogenic cryostat is made by metal superconductors, whose electronic thermal conductivity can be switched on by applying magnetic field to suppress the superconductivity. 1 This kind of heat switch works only at very low temperatures (well below the superconducting transition temperatures or at subKelvin temperatures). Since the phonon thermal conductivity at such low temperatures are negligibly small, the total thermal conductivity can be changed by several orders of magnitude with magnetic field, a nearly ideal thermal insulator to good thermal conductor transition. At not very low temperatures, the thermal conductivity (κ) of any materials usually cannot be significantly changed by control parameter, 5,6 since there is always sizeable phonon thermal conductivity which is not easily changed much. However, past decades studies on the heat transport of magnetic materials have revealed that the phonon thermal conductivity can be remarkably changed by magnetic field in the case there is strong scattering between phonons and magnetic excitations. 7-12 In partica) Electronic mail: lxgrz@ustc.edu.cn b) Electronic mail: xfsun@ustc.edu.cn ular, a large magnetic-field-induced increase of κ can be observed in rare-earth manganites and titanates. 10,11 In this Letter, we report exceptionally large magnetothermal conductivity in an antiferromagnetic insulator, Co 3 V 2 O 8 . As large as 100 times increase of κ in magnetic field was found at temperature of several kelvins. The result provides a possible route to find heat switch devices that can work at not very low temperatures.Co 3 V 2 O 8 has a crystal lattice with space group Cmca. 2,3 The edge sharing CoO 6 octahedra form a staircase kagomé structure and the kagomé staircase lattices are separated by the nonmagnetic VO 4 tetrahedra (see Fig. S1 of the Sup...

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Magnetic field-induced transitions in geometrically frustratedCo3V2O8single crystal

Cited by 59 publications

References 27 publications

Magnetic anisotropy in geometrically frustrated kagome staircase lattices

Magnetic anisotropy in geometrically frustrated kagome staircase lattices

Quantum phase transitions and decoupling of magnetic sublattices in the quasi-two-dimensional Ising magnetCo3V2O8in a transverse magnetic field

Heat switch effect in an antiferromagnetic insulator Co3V2O8

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