NMR study of the high-field magnetic phase of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mtext>LiCuVO</mml:mtext></mml:mrow><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>

Büttgen, N.; Kraetschmer, W.; Svistov, L. E.; Prozorova, L. A.; Prokofiev, A.

doi:10.1103/physrevb.81.052403

Cited by 35 publications

(39 citation statements)

References 14 publications

(17 reference statements)

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“…Sample S0 was used in the previous NMR experiments in Refs. [28][29][30] and obtained from the same batch as S0 * whose M (H) curve is shown in Fig. 1.…”

Section: Resultsmentioning

confidence: 99%

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Search for a spin-nematic phase in the quasi-one-dimensional frustrated magnetLiCuVO4

et al. 2014

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We have performed NMR experiments on the quasi one-dimensional frustrated spin-1/2 system LiCuVO4 in magnetic fields H applied along the c-axis up to field values near the saturation field Hsat. For the field range Hc2 < H < Hc3 (µ0Hc2 ≈ 7.5 T and µ0Hc3 = [40.5 ± 0.2] T) the 51 V NMR spectra at T = 380 mK exhibit a characteristic double-horn pattern, as expected for a spinmodulated phase in which the magnetic moments of Cu 2+ ions are aligned parallel to the applied field H and their magnitudes change sinusoidally along the magnetic chains. For higher fields, the 51 V NMR spectral shape changes from the double-horn pattern into a single Lorentzian line. For this Lorentzian line, the internal field at the 51 V nuclei stays constant for µ0H > 41.4 T, indicating that the majority of magnetic moments in LiCuVO4 are already saturated in this field range. This result is inconsistent with the previously observed linear field dependence of the magnetization M (H) for Hc3 < H < Hsat with µ0Hsat = 45 T [L. E. Svistov et al., JETP Letters 93, 21 (2011)]. We argue that the discrepancy is due to non-magnetic defects in the samples. The results of the spin-lattice relaxation rate of 7 Li nuclei indicate an energy gap which grows with field twice as fast as the Zeeman energy of a single spin, therefore, suggesting that the two-magnon bound state is the lowest energy excitation. The energy gap tends to close at µ0H ≈ 41 T. Our results suggest that the theoretically predicted spin-nematic phase, if it exists in LiCuVO4, can be established only within the narrow field range 40.5 < µ0H < 41.4 T .

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“…Sample S0 was used in the previous NMR experiments in Refs. [28][29][30] and obtained from the same batch as S0 * whose M (H) curve is shown in Fig. 1.…”

Section: Resultsmentioning

confidence: 99%

“…24 Let us first summarize the results of the previous studies on the magnetic phases of LiCuVO 4 for fields lower than µ 0 H = 30 T (Refs. [25][26][27][28][29][30][31][32][33]. At zero field, an incommensurate planar spiral structure is realized below T N ≈ 2.3 K with the moments lying in the ab-plane.…”

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Search for a spin-nematic phase in the quasi-one-dimensional frustrated magnetLiCuVO4

et al. 2014

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“…is one of the first [1,2] and rather frequently studied spinchain compounds among edge-shared cuprates [3][4][5][6][7]. Recently it became especially interesting due to the observation of multiferroicity [8][9][10] and due to a possible realization of quantum spin nematics and related Bose-Einstein condensation of two-magnon bound states in high magnetic fields [11][12][13].…”

Section: Introduction -Livcuo 4 ≡ Licuvomentioning

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The strength of frustration and quantum fluctuations in LiVCuO ₄

Nishimoto¹,

Drechsler²,

Kuzian³

et al. 2012

EPL

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-We present an empirical and microscopical analysis of the main in-chain exchange constants of the edge-shared frustratrated chain cuprate LiVCuO4= LiCuVO4 with a ferromagnetic nearest neighbour coupling which clearly exceeds the antiferromagnetic (AFM) next-nearest neighbour exchange J2. The measured saturation field is significantly affected by a weak 3D AFM interchain coupling leaving room for a possible Bose-Einstein condensation for several T below. The obtained exchange parameters are in agreement with the results for a realistic five-band extended Hubbard Cu 3d O 2p model, LSDA+U predictions as well as with inelastic neutron and magnetization data. The single chain frustration rate α = J2/|J1| ≈ 0.75, including all error bars, is definitely smaller than 1.0 which correspond to strongly coupled interpenetrating AFM Heisenberg chains in contrast with opposite statements in the literature. A proper account of strong quantum fluctuations and frustration is necessary for a correct assignment of the exchange integrals. which cannot be achieved by a simple renormalization of J2 from spin-wave theory.

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“…Different exponents in power laws point to 3D and quasi-2D properties, respectively, of these phases confirming that the antiferromagnetic ordering between neighboring ab planes in the SM structure is destroyed. This effect was previously reported in neutronscattering and NMR measurements [16,23]. The replacement of a sharp λ anomaly at the transition to the helical state by a broad feature at the crossover to the SM state gives another hint of this change.…”

Section: Discussionmentioning

confidence: 63%

Magnetic field driven 2D-3D crossover in theS=12frustrated chain magnetLiCuVO4

et al. 2015

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(2015) Magnetic field driven 2D-3D crossover in the S=12 frustrated chain magnet LiCuVO4. Physical Review B, 91 (17). 174410. Permanent WRAP URL:http://wrap.warwick.ac.uk/87838 Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes this work by researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. Publisher statement: © 2015 American Physical Society A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP URL' above for details on accessing the published version and note that access may require a subscription.For more information, please contact the WRAP Team at: wrap@warwick.ac.uk PHYSICAL REVIEW B 91, 174410 (2015) Magnetic field driven 2D-3D crossover in the S = We report on a heat-capacity study of high-quality single-crystal samples of LiCuVO 4 -a frustrated spin S = 1 2 chain system-in a magnetic field amounting to 3/4 of the saturation field. A detailed examination of magnetic phase transitions observed in this field range shows that although the low-field helical state clearly has three-dimensional properties, the field-induced spin-modulated phase turns out to be quasi-two-dimensional. The model proposed in this paper allows one to qualitatively understand this crossover, thus eliminating the presently existing contradictions in the interpretations of NMR and neutron-scattering measurements.

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NMR study of the high-field magnetic phase ofLiCuVO4

Cited by 35 publications

References 14 publications

Search for a spin-nematic phase in the quasi-one-dimensional frustrated magnetLiCuVO4

Search for a spin-nematic phase in the quasi-one-dimensional frustrated magnetLiCuVO4

The strength of frustration and quantum fluctuations in LiVCuO ₄

Magnetic field driven 2D-3D crossover in theS=12frustrated chain magnetLiCuVO4

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NMR study of the high-field magnetic phase ofLiCuVO4

Cited by 35 publications

References 14 publications

Search for a spin-nematic phase in the quasi-one-dimensional frustrated magnetLiCuVO4

Search for a spin-nematic phase in the quasi-one-dimensional frustrated magnetLiCuVO4

The strength of frustration and quantum fluctuations in LiVCuO 4

Magnetic field driven 2D-3D crossover in theS=12frustrated chain magnetLiCuVO4

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Product

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The strength of frustration and quantum fluctuations in LiVCuO ₄