Anomalous magnetic thermodynamics in uncompensated collinear antiferromagnets

Charilaou, M.; Hellman, F.

doi:10.1209/0295-5075/107/27002

Title: Anomalous magnetic thermodynamics in uncompensated collinear antiferromagnets

Journal Article · Wed Jul 09 00:00:00 EDT 2014 · Europhysics Letters

DOI:https://doi.org/10.1209/0295-5075/107/27002· OSTI ID:1511402

Charilaou, M. ^[1]; Hellman, F. ^[1]

Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Monte Carlo simulations show that the net magnetization of collinear antiferromagnets (AFM) with uncompensated surfaces exhibits a unique thermodynamic behavior, with a temperature dependence unlike that of ferromagnets or of the Néel vector. The magnetization of AFM is not equal to that of its surface, even though it results from surface effects. This phenomenon appears in thin AFM films but is valid even in the limit of semi-infinite systems. The net magnetization of AFM therefore corresponds to a distinct topological thermodynamic state due to the free surface.

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Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Materials Sciences & Engineering Division (SC-22.2)

DOE Contract Number:: AC02-05CH11231

OSTI ID:: 1511402

Journal Information:: Europhysics Letters, Vol. 107, Issue 2; ISSN 0295-5075

Publisher:: IOP Publishing

Country of Publication:: United States

Language:: English

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