1. Symmetric and antisymmetric exchange anisotropies in quasi-one-dimensional CuSe2O5 as revealed by ESR.
- Author
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Herak, M., Zorko, A., Arčon, D., Potočnik, A., Klanjžek, M., Van Tol, J., Ozarowski, A., and Berger, H.
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ELECTRON paramagnetic resonance , *CRYSTAL structure , *TEMPERATURE , *ANTIFERROMAGNETISM , *ANISOTROPY , *SINGLE crystals - Abstract
We present an electron spin resonance (ESR) study of a single-crystalline spin chain system CuSe2O5 in the frequency range between 9 and 430 GHz. In a wide temperature range above the Nrel temperature TN = 17 K we observe a strong and anisotropic frequency dependence of a resonance linewidth. Although a sizable interchain interaction JIC ≈ 0.1J (J is the intrachain interaction) is present in this system, the ESR results agree well with the Oshikawa-Affleck theory for a one-dimensional S = 1/2 Heisenberg antiferromagnet. This theory is used to extract the anisotropies present in CuSe2O5. We find that the symmetric anisotropic exchange Jc = (0.04 ± 0.01)J and the antisymmetric Dzyaloshinskii-Moriya (DM) interaction D = (0.05 ± 0.01)J are very similar in size in this system. Staggered field susceptibility induced by the presence of the DM interaction is witnessed in the macroscopic susceptibility anisotropy. [ABSTRACT FROM AUTHOR]
- Published
- 2011
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