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Title: Quasi-one-dimensional magnetism in the spin-12 antiferromagnet BaNa2Cu(VO4)2

Abstract

Here, we report synthesis and magnetic properties of quasi-one-dimensional spin- 1 2 Heisenberg antiferromagnetic chain compound BaNa 2 Cu ( VO 4 ) 2 . This orthovanadate has a centrosymmetric crystal structure, C 2 / c , where the magnetic Cu 2 + ions form spin chains. These chains are arranged in layers, with the chain direction changing by 62° between the two successive layers. Alternatively, the spin lattice can be viewed as anisotropic triangular layers upon taking the interchain interactions into consideration. Despite this potential structural complexity, temperature-dependent magnetic susceptibility, heat capacity, electron spin resonance intensity, and nuclear magnetic resonance (NMR) shift agree well with the uniform spin- 1 / 2 Heisenberg chain model with an intrachain coupling of J / k B 5.6 K. The saturation field obtained from the magnetic isotherm measurement consistently reproduces the value of J / k B . Further, the V 51 NMR spin-lattice relaxation rate mimics the one-dimensional character in the intermediate temperature range, whereas magnetic long-range order sets in below T N 0.25 K. The effective interchain coupling is estimated to be J / k B 0.1 K. The theoretical estimation of exchange couplings using band-structure calculations reciprocate our experimental findings and unambiguously establish the one-dimensional character of the compound. Finally, the spin lattice of BaNa 2 Cu ( VO 4 ) 2 is compared with the chemically similar but not isostructural compound BaAg 2 Cu ( VO 4 ) 2 .

Authors:
ORCiD logo [1];  [1];  [2];  [1];  [1];  [3]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [2]; ORCiD logo [1]
  1. Indian Inst. of Science Education and Research Thiruvananthapuram (India)
  2. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
  3. Max Planck Inst. for Chemical Physics of Solids, Dresden (Germany)
  4. Univ. of Augsburg (Germany)
Publication Date:
Research Org.:
Ames Lab., Ames, IA (United States)
Sponsoring Org.:
Science and Engineering Research Board (SERB); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; Alexander von Humboldt Foundation
OSTI Identifier:
1764840
Report Number(s):
IS-J-10,411
Journal ID: ISSN 2469-9950; TRN: US2206211
Grant/Contract Number:  
CRG/2019/000960; AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 103; Journal Issue: 6; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Sebastian, Sebin J., Somesh, K., Nandi, M., Ahmed, N., Bag, P., Baenitz, M., Koo, B., Sichelschmidt, J., Tsirlin, A. A., Furukawa, Y., and Nath, R. Quasi-one-dimensional magnetism in the spin-12 antiferromagnet BaNa2Cu(VO4)2. United States: N. p., 2021. Web. doi:10.1103/physrevb.103.064413.
Sebastian, Sebin J., Somesh, K., Nandi, M., Ahmed, N., Bag, P., Baenitz, M., Koo, B., Sichelschmidt, J., Tsirlin, A. A., Furukawa, Y., & Nath, R. Quasi-one-dimensional magnetism in the spin-12 antiferromagnet BaNa2Cu(VO4)2. United States. https://doi.org/10.1103/physrevb.103.064413
Sebastian, Sebin J., Somesh, K., Nandi, M., Ahmed, N., Bag, P., Baenitz, M., Koo, B., Sichelschmidt, J., Tsirlin, A. A., Furukawa, Y., and Nath, R. Mon . "Quasi-one-dimensional magnetism in the spin-12 antiferromagnet BaNa2Cu(VO4)2". United States. https://doi.org/10.1103/physrevb.103.064413. https://www.osti.gov/servlets/purl/1764840.
@article{osti_1764840,
title = {Quasi-one-dimensional magnetism in the spin-12 antiferromagnet BaNa2Cu(VO4)2},
author = {Sebastian, Sebin J. and Somesh, K. and Nandi, M. and Ahmed, N. and Bag, P. and Baenitz, M. and Koo, B. and Sichelschmidt, J. and Tsirlin, A. A. and Furukawa, Y. and Nath, R.},
abstractNote = {Here, we report synthesis and magnetic properties of quasi-one-dimensional spin-12 Heisenberg antiferromagnetic chain compound BaNa2Cu(VO4)2. This orthovanadate has a centrosymmetric crystal structure, C2/c, where the magnetic Cu2+ ions form spin chains. These chains are arranged in layers, with the chain direction changing by 62° between the two successive layers. Alternatively, the spin lattice can be viewed as anisotropic triangular layers upon taking the interchain interactions into consideration. Despite this potential structural complexity, temperature-dependent magnetic susceptibility, heat capacity, electron spin resonance intensity, and nuclear magnetic resonance (NMR) shift agree well with the uniform spin-1/2 Heisenberg chain model with an intrachain coupling of J/kB≃5.6 K. The saturation field obtained from the magnetic isotherm measurement consistently reproduces the value of J/kB. Further, the V51 NMR spin-lattice relaxation rate mimics the one-dimensional character in the intermediate temperature range, whereas magnetic long-range order sets in below TN≃0.25 K. The effective interchain coupling is estimated to be J⊥/kB≃0.1 K. The theoretical estimation of exchange couplings using band-structure calculations reciprocate our experimental findings and unambiguously establish the one-dimensional character of the compound. Finally, the spin lattice of BaNa2Cu(VO4)2 is compared with the chemically similar but not isostructural compound BaAg2Cu(VO4)2.},
doi = {10.1103/physrevb.103.064413},
journal = {Physical Review B},
number = 6,
volume = 103,
place = {United States},
year = {Mon Feb 08 00:00:00 EST 2021},
month = {Mon Feb 08 00:00:00 EST 2021}
}

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