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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

Journal Article · · Physical Review B
 [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)

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.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1376477
Alternate ID(s):
OSTI ID: 1372718
Journal Information:
Physical Review B, Vol. 96, Issue 2; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

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Cited By (3)