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Skourski, Y.; Kuz’min, M. D.; Skokov, Konstantin P.; Андреев, А.В.; Wosnitza, J.

doi:10.1103/physrevb.83.214420

Cited by 145 publications

(59 citation statements)

References 19 publications

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“…The spin-nematic state is a homogeneous, field-dependent, longitudinal spin state without any transverse dipolar order, thus corresponding to a field-dependent NMR line position without any change of its width with respect to the saturated phase. Our NMR results in LiCuVO 4 , together with the bulk magnetization measurements [28,29], perfectly match these predictions; they thus provide the first microscopic experimental evidence for the existence of a spin-nematic phase.…”

supporting

confidence: 82%

Closing in on a Magnetic Analog of Liquid Crystals

Frederic

2017

Physics

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We report a 51 V nuclear magnetic resonance investigation of the frustrated spin-1=2 chain compound LiCuVO 4 , performed in pulsed magnetic fields and focused on high-field phases up to 56 T. For the crystal orientations H∥c and H∥b, we find a narrow field region just below the magnetic saturation where the local magnetization remains uniform and homogeneous, while its value is field dependent. This behavior is the first microscopic signature of the spin-nematic state, breaking spin-rotation symmetry without generating any transverse dipolar order, and is consistent with theoretical predictions for the LiCuVO 4 compound. DOI: 10.1103/PhysRevLett.118.247201 The search for new states of quantum matter is one of the most active research fields in condensed-matter physics. In this respect, frustrated magnetic systems attract a lot of interest as they accommodate various unconventional quantum states, having no direct classical analogues, ordered and disordered, induced by the competing interactions [1]. One particularly interesting state is the spinnematic phase, in which the quantum magnet behaves like a liquid crystal. Taking an external magnetic field H as the reference direction, a spin-nematic phase is defined as a state without any transverse dipolar (i.e., vector-type) order,The quadrupolar order parameter develops on the bonds between neighboring spins and can be described as a condensate of two-magnon pairs. It breaks the spinrotational symmetry about the magnetic field, but only partially as π rotations transform the order parameter into itself. The also broken translational symmetry of the order parameter is invisible in the dipolar channel. There is also an analogy between the spin-nematic phase and the superconducting state: the nematic phase can be considered as a "bosonic" superconductor formed as a result of twomagnon condensation [1,2].The concept of a spin-nematic state was developed by Andreev and Grishchuk more than 30 years ago [3], which incited an intense search for a realization in real materials. However, a definite experimental proof for the existence of such a phase has not been provided yet. Several magnetic insulators have been proposed as possible candidates, including the two-dimensional magnet NiGa 2 S 4 (spin-1 system) [4-6] and thin films of 3 He [7][8][9].In the past 10 years a large number of theoretical studies have supported the formation of the spin-nematic phase in frustrated zigzag 1D (chain) systems [10][11][12][13][14]. Among these, orthorhombic LiCuVO 4 is one of the most promising candidates [15,16]. It consists of spin-1=2 Cu 2þ chains along the orthorhombic b axis with a dominant nearestneighbor ferromagnetic interaction J 1 ¼ −1.6 meV, a frustrated next-nearest-neighbor antiferromagnetic interaction J 2 ¼ 3.8 meV, and an interchain coupling J ¼ −0.4 meV [17,18]. At zero magnetic field an incommensurate planar spiral structure is realized below T N ¼ 2.3 K, having the moments lying in the ab plane [19,20]. Above 10 T, an incommensurate, collinear spin-density wave (S...

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confidence: 82%

Closing in on a Magnetic Analog of Liquid Crystals

Frederic

2017

Physics

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“…46; the pulsed-field magnetometer was described in Ref. 43. One measurement was performed in a 74-T pulse using the high-field facility at ISSP in Kashiwa (University of Tokyo).…”

Section: Methodsmentioning

confidence: 99%

High magnetic field study of the Tm2Fe17and Tm2Fe
Isnard
¹
,
Андреев²,
Kuz’min³
et al. 2013
Phys. Rev. B
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17
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A magnetization study of a Tm 2 Fe 17 single crystal and aligned powder of the deuteride Tm 2 Fe 17 D 3.2 has been carried out in steady (14 T) and pulsed (60 T and, in one case, up to 74 T) magnetic fields at temperatures between 1.5 and 300 K. Tm 2 Fe 17 is a ferrimagnet with T C = 295 K and a spontaneous moment of 22 μ B /f.u. at T = 4.2 K. Of particular interest are low-temperature magnetization curves along the sixfold crystal axis c, which is an easy direction in Tm 2 Fe 17 and a hard direction in the deuteride. In either case the magnetization increases with magnetic field undulatorily in broad steps whose height is a multiple of the atomic moment of Tm, μ Tm = 7 μ B . In Tm 2 Fe 17 , the positions of the steps yield information on the Fe-Tm molecular field, 48 T on the Tm 2d site and 60 T on the Tm 2b site, whereas the crystal field parameter A 66 is found from the widths of the steps: A 66 (b) = −35 Ka −6 0 and A 66 (d) = −26 Ka −6 0 (here a 0 is the Bohr radius). It also proves possible to estimate the other sixth-order crystal field parameter: A 60 ∼ − 4 Ka −6 0 (on average for both sites). Less information can be extracted from the powder data for the deuteride. Thus, the mean molecular field on Tm in Tm 2 Fe 17 D 3.2 is found to be 49 T or 9% less than in the parent binary compound.

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“…[46] The identical sample was measured up to 14 T using the VSM option of the PPMS, in order to extract absolute values 8 from the pulse field results. The results of the magnetization measurements on a polycrystalline sample, determined in the pulse field magnetometer at 4.3(1) K, can be seen in Figure 10.…”

Section: High Magnetic Field Magnetizationmentioning

confidence: 99%

“…Pulse field isothermal magnetization up to ∼ 60 T were measured at the Hochfeld-Magnetlabor Dresden, Helmholtz-Zentrum Dresden-Rossendorf, Germany on a 35.4 mg sample, using compensated coils. [46] In order to determine the scale factor for the pulse field results magnetization up to 14 T of the identical sample were also determined using the VSM option of a physical property measurement system (PPMS) (Quantum Design).…”

Section: Magnetic Susceptibility Magnetization and Specific Heatmentioning

confidence: 99%

Strongly correlated one-dimensional magnetic behavior ofNiTa2O6

Law

Koo²,

Whangbo³

et al. 2014

Phys. Rev. B

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The magnetic properties of NiTa2O6 were investigated by magnetic susceptibility, specific heat, electron paramagnetic resonance, neutron powder diffraction and pulse field magnetization measurements. Accompanying ab initio DFT calculations of the spin-exchange constants complemented and supported our experimental findings that NiTa2O6 must be described as a quasi-1D Heisenberg S = 1 spin chain system with a nearest-neighbor only anti-ferromagnetic spin-exchange interaction of 18.92(2) K. Inter-chain coupling is by about two orders of magnitude smaller. Electron paramagnetic resonance measurements on Mg1−xNixTa2O6 (x ≈ 1%) polycrystalline samples enabled us to estimate the single-ion zero-field splitting of the S = 1 states which amounts to less than 4% of the nearest-neighbor spin-exchange interaction. At 0 T NiTa2O6 undergoes long-range antiferromagnetic ordering at 10.3(1) K evidenced by a λ-type anomaly in the specific heat capacity. On application of a magnetic field the specific heat anomaly is smeared out. We confirmed the magnetic structure by neutron powder diffraction measurements and at 2.00(1) K refined a magnetic moment of 1.93(5) µB per Ni 2+ ion. Additionally, we followed the magnetic order parameter as a function of temperature. Lastly we found saturation of the magnetic moment at 55.5(5) T with a g-factor of 2.14(1), with an additional high field phase above 12.8(1) T. The onset of the new high field phase is not greatly effected by temperature, but rather smears out as one approaches the long-range ordering temperature.

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High-field magnetization of Ho2Fe17

Cited by 145 publications

References 19 publications

Closing in on a Magnetic Analog of Liquid Crystals

Closing in on a Magnetic Analog of Liquid Crystals

High magnetic field study of the Tm2Fe17and Tm2Fe
Isnard
¹
,
Андреев²,
Kuz’min³
et al. 2013
Phys. Rev. B
Self Cite
29
2
17
0
View full text Add to dashboard Cite

Strongly correlated one-dimensional magnetic behavior ofNiTa2O6

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High-field magnetization of Ho2Fe17

Cited by 145 publications

References 19 publications

Closing in on a Magnetic Analog of Liquid Crystals

Closing in on a Magnetic Analog of Liquid Crystals

High magnetic field study of the Tm2Fe17and Tm2FeIsnard1, Андреев2, Kuz’min3 et al. 2013Phys. Rev. BSelf Cite292170View full textAdd to dashboardCite

Strongly correlated one-dimensional magnetic behavior ofNiTa2O6

Contact Info

Product

Resources

About

High magnetic field study of the Tm2Fe17and Tm2Fe
Isnard
¹
,
Андреев²,
Kuz’min³
et al. 2013
Phys. Rev. B
Self Cite
29
2
17
0
View full text Add to dashboard Cite