Field-induced anisotropy in the quasi-two-dimensional weakly anisotropic antiferromagnet [CuCl(pyz)2]BF4

Sungmin Kwon; M. Jeong; M. Kubus; B. Wehinger; K. W. Krämer; Ch. Rüegg; H. M. Rønnow; Soonchil Lee

doi:10.1103/PhysRevB.99.214403

Field-induced anisotropy in the quasi-two-dimensional weakly anisotropic antiferromagnet [CuCl(pyz)2]BF4

Sungmin Kwon, M. Jeong, M. Kubus, B. Wehinger, K. W. Krämer, Ch. Rüegg, H. M. Rønnow, Soonchil Lee

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

190 Downloads (Pure)

Abstract

We measured NMR and magnetic susceptibility for the quasi-two-dimensional, weakly XY -like, spin-1/2 square-lattice Heisenberg antiferromagnet [CuCl(pyz)₂]BF₄ (pyz = pyrazine = N₂C₄H₄) near the critical temperature. The Néel temperature T_N and the order-parameter critical exponent β were obtained from the NMR line broadening as a function of temperature. As the applied field strength (H || c) was increased, T_N increased and β decreased. This behavior indicates that the field effectively enhanced XY anisotropy. The susceptibility as a function of temperature did not show a clear feature for T_N, but showed field-dependent minima below T_N for both H || c and H || ab, where minimum features disappeared for μ₀H > 2 T.

Original language	English
Article number	214403
Number of pages	5
Journal	Physical Review B
Volume	99
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.99.214403
Publication status	Published - 3 Jun 2019

Access to Document

10.1103/PhysRevB.99.214403

Sungmin_Kwon_et_al_Field_induced_anisotropy_in_the_quasi_two_dimensional_weakly_anisotropic_antiferromagnet_Physical_Review_B_2019
Checked for eligibility: 28/06/2019 Kwon, S., Jeong, M., Kubus, M., Wehinger, B., Krämer, K.W., Rüegg, C., Rønnow, H.M. and Lee, S., 2019. Field-induced anisotropy in the quasi-two-dimensional weakly anisotropic antiferromagnet [CuCl (pyz) 2] BF 4. Physical Review B, 99(21), p.214403. ©2019 American Physical Society. https://doi.org/10.1103/PhysRevB.99.214403
Final published version, 821 KBLicence: None: All rights reserved

https://link.aps.org/doi/10.1103/PhysRevB.99.214403Licence: None: All rights reserved

Cite this

@article{ae957d8909304a35a28a66deeef7e323,

title = "Field-induced anisotropy in the quasi-two-dimensional weakly anisotropic antiferromagnet [CuCl(pyz)2]BF4",

abstract = "We measured NMR and magnetic susceptibility for the quasi-two-dimensional, weakly XY -like, spin-1/2 square-lattice Heisenberg antiferromagnet [CuCl(pyz)2]BF4 (pyz = pyrazine = N2C4H4) near the critical temperature. The N{\'e}el temperature TN and the order-parameter critical exponent β were obtained from the NMR line broadening as a function of temperature. As the applied field strength (H || c) was increased, TN increased and β decreased. This behavior indicates that the field effectively enhanced XY anisotropy. The susceptibility as a function of temperature did not show a clear feature for TN, but showed field-dependent minima below TN for both H || c and H || ab, where minimum features disappeared for μ0H > 2 T.",

author = "Sungmin Kwon and M. Jeong and M. Kubus and B. Wehinger and Kr{\"a}mer, {K. W.} and Ch. R{\"u}egg and R{\o}nnow, {H. M.} and Soonchil Lee",

year = "2019",

month = jun,

day = "3",

doi = "10.1103/PhysRevB.99.214403",

language = "English",

volume = "99",

journal = "Physical Review B",

issn = "2469-9950",

publisher = "American Physical Society (APS)",

number = "21",

}

TY - JOUR

T1 - Field-induced anisotropy in the quasi-two-dimensional weakly anisotropic antiferromagnet [CuCl(pyz)2]BF4

AU - Kwon, Sungmin

AU - Jeong, M.

AU - Kubus, M.

AU - Wehinger, B.

AU - Krämer, K. W.

AU - Rüegg, Ch.

AU - Rønnow, H. M.

AU - Lee, Soonchil

PY - 2019/6/3

Y1 - 2019/6/3

N2 - We measured NMR and magnetic susceptibility for the quasi-two-dimensional, weakly XY -like, spin-1/2 square-lattice Heisenberg antiferromagnet [CuCl(pyz)2]BF4 (pyz = pyrazine = N2C4H4) near the critical temperature. The Néel temperature TN and the order-parameter critical exponent β were obtained from the NMR line broadening as a function of temperature. As the applied field strength (H || c) was increased, TN increased and β decreased. This behavior indicates that the field effectively enhanced XY anisotropy. The susceptibility as a function of temperature did not show a clear feature for TN, but showed field-dependent minima below TN for both H || c and H || ab, where minimum features disappeared for μ0H > 2 T.

AB - We measured NMR and magnetic susceptibility for the quasi-two-dimensional, weakly XY -like, spin-1/2 square-lattice Heisenberg antiferromagnet [CuCl(pyz)2]BF4 (pyz = pyrazine = N2C4H4) near the critical temperature. The Néel temperature TN and the order-parameter critical exponent β were obtained from the NMR line broadening as a function of temperature. As the applied field strength (H || c) was increased, TN increased and β decreased. This behavior indicates that the field effectively enhanced XY anisotropy. The susceptibility as a function of temperature did not show a clear feature for TN, but showed field-dependent minima below TN for both H || c and H || ab, where minimum features disappeared for μ0H > 2 T.

U2 - 10.1103/PhysRevB.99.214403

DO - 10.1103/PhysRevB.99.214403

M3 - Article

SN - 2469-9950

VL - 99

JO - Physical Review B

JF - Physical Review B

IS - 21

M1 - 214403

ER -

Field-induced anisotropy in the quasi-two-dimensional weakly anisotropic antiferromagnet [CuCl(pyz)2]BF4

Abstract

Access to Document

Fingerprint

Cite this