Magnetic susceptibility in quasi one-dimensional Baa2V3O9: chain segmentation versus the staggered field effect View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2003-03

AUTHORS

B. Schmidt, V. Yushankhai, L. Siurakshina, P. Thalmeier

ABSTRACT

A pronounced Curie-like upturn of the magnetic susceptibility x (T) of the quasi one-dimensional spin chain compound Ba2V3O9 has been found recently [1]. Frequently this is taken as a signature for a staggered field mechanism due to the presence of g-factor anisotropy and Dzyaloshinskii-Moriya interaction. We calculate this contribution within a realistic structure of vanadium 3 d- and oxygen 2p-orbitals and conclude that this mechanism is far too small to explain experimental results. We propose that the Curie term is rather due to a segmentation of spin chains caused by broken magnetic bonds which leads to uncompensated S = ½ spins of segments with odd numbers of spins. Using the finite-temperature Lanczos method we calculate their effective moment and show that ˜ 1% of broken magnetic bonds is sufficient to reproduce the anomalous low-T behavior of x(T) in Ba2V3O9. More... »

PAGES

43-47

Identifiers

URI

http://scigraph.springernature.com/pub.10.1140/epjb/e2003-00072-0

DOI

http://dx.doi.org/10.1140/epjb/e2003-00072-0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1052625917


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