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Springer, Journal of the Korean Physical Society, 2(59), p. 317-321, 2011

DOI: 10.3938/jkps.59.317

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Hysteresis Loops in an Oxo-centered {Mn_3O}-type Spin Triangle Probed with a Pulsed Field

Journal article published in 2011 by Park J.-N., H. Jang Z., J. Suh B., B. J. Suh, K.-Y. Choi, H. Nojiri ORCID, Z. H. Jang
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

We have investigated the energy gap responsible for the quantum transition by measuring the magnetization of a trinuclear oxo-centered Mn complex; [MnO3(O2CPh)(6)(pyr)(2)(H2O)]center dot 0.5 MeCN. The equilibrium magnetization was measured with a superconducting quantum interference device (SQUID) magnetometer and was analyzed with an irreducible tensor operator (ITO) technique to obtain time magnetic exchange and the anisotropy constants. The unusual magnetization steps observed at B approximate to 0 in the hysteresis from pulsed magnet experiments were successfully reproduced with a numerical simulation based on a Bloch-type equation including a Landau-Zener-Stuckelberg (LZS) transition term for which the energy gap is field dependent, and Delta(0) = 2.0 mK at B = 0.