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Title: Magnetic structure and dispersion relation of the S = 1 2 quasi-one-dimensional Ising-like antiferromagnet BaCo 2 V 2 O 8 in a transverse magnetic field

Abstract

Here, BaCo2V2O8 consists of Co chains in which a Co2+ ion carries a fictitious spin 1/2 with Ising anisotropy. We performed elastic and inelastic neutron scattering experiments in BaCo2V2O8 in a magnetic field perpendicular to the c axis which is the chain direction. With applying magnetic field along the a axis at 3.5 K, the antiferromagnetic order with the easy axis along the c axis, observed in zero magnetic field, is completely suppressed at 8 T, while the magnetic field gradually induces an antiferromagnetic order with the spin component along the b axis. We also studied magnetic excitations as a function of transverse magnetic field. The lower boundary of the spinon excitations splits gradually with increasing magnetic field. The overall feature of the magnetic excitation spectra in the magnetic field is reproduced by the theoretical calculation based on the spin 1/2 XXZ antiferromagnetic chain model, which predicts that the dynamic magnetic structure factor of the spin component along the chain direction is enhanced and that along the field direction has clear incommensurate correlations.

Authors:
 [1];  [2];  [3];  [4];  [1]; ORCiD logo [1];  [5];  [6];  [7];  [2];  [8];  [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Japan Atomic Energy Agency, Ibaraki (Japan)
  3. Osaka Univ., Osaka (Japan)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Shanghai Jiao Tong Univ., Shanghai (People's Republic of China)
  5. NIST Center for Neutron Research, Gaithersburg, MD (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  6. NIST Center for Neutron Research, Gaithersburg, MD (United States)
  7. Niigata Univ., Niigata (Japan)
  8. Tohoku Univ., Sendai (Japan)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1376477
Alternate Identifier(s):
OSTI ID: 1372718
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 2; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Matsuda, M., Onishi, H., Okutani, A., Ma, J., Agrawal, H., Hong, Tao, Pajerowski, D. M., Copley, J. R. D., Okunishi, K., Mori, M., Kimura, S., and Hagiwara, M. Magnetic structure and dispersion relation of the S=12 quasi-one-dimensional Ising-like antiferromagnet BaCo2V2O8 in a transverse magnetic field. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.024439.
Matsuda, M., Onishi, H., Okutani, A., Ma, J., Agrawal, H., Hong, Tao, Pajerowski, D. M., Copley, J. R. D., Okunishi, K., Mori, M., Kimura, S., & Hagiwara, M. Magnetic structure and dispersion relation of the S=12 quasi-one-dimensional Ising-like antiferromagnet BaCo2V2O8 in a transverse magnetic field. United States. doi:10.1103/PhysRevB.96.024439.
Matsuda, M., Onishi, H., Okutani, A., Ma, J., Agrawal, H., Hong, Tao, Pajerowski, D. M., Copley, J. R. D., Okunishi, K., Mori, M., Kimura, S., and Hagiwara, M. Tue . "Magnetic structure and dispersion relation of the S=12 quasi-one-dimensional Ising-like antiferromagnet BaCo2V2O8 in a transverse magnetic field". United States. doi:10.1103/PhysRevB.96.024439. https://www.osti.gov/servlets/purl/1376477.
@article{osti_1376477,
title = {Magnetic structure and dispersion relation of the S=12 quasi-one-dimensional Ising-like antiferromagnet BaCo2V2O8 in a transverse magnetic field},
author = {Matsuda, M. and Onishi, H. and Okutani, A. and Ma, J. and Agrawal, H. and Hong, Tao and Pajerowski, D. M. and Copley, J. R. D. and Okunishi, K. and Mori, M. and Kimura, S. and Hagiwara, M.},
abstractNote = {Here, BaCo2V2O8 consists of Co chains in which a Co2+ ion carries a fictitious spin 1/2 with Ising anisotropy. We performed elastic and inelastic neutron scattering experiments in BaCo2V2O8 in a magnetic field perpendicular to the c axis which is the chain direction. With applying magnetic field along the a axis at 3.5 K, the antiferromagnetic order with the easy axis along the c axis, observed in zero magnetic field, is completely suppressed at 8 T, while the magnetic field gradually induces an antiferromagnetic order with the spin component along the b axis. We also studied magnetic excitations as a function of transverse magnetic field. The lower boundary of the spinon excitations splits gradually with increasing magnetic field. The overall feature of the magnetic excitation spectra in the magnetic field is reproduced by the theoretical calculation based on the spin 1/2 XXZ antiferromagnetic chain model, which predicts that the dynamic magnetic structure factor of the spin component along the chain direction is enhanced and that along the field direction has clear incommensurate correlations.},
doi = {10.1103/PhysRevB.96.024439},
journal = {Physical Review B},
number = 2,
volume = 96,
place = {United States},
year = {2017},
month = {7}
}

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