Quantum dissipation theory of slow magnetic relaxation mediated by domain-wall motion in the one-dimensional chain compound {[}Mn(hfac)(2)BNOH] / Ovchinnikov A. S.,Bostrem I. G.,Sinitsyn V. E.,Boyarchenkov A. S.,Baranov N. V.,Inoue K. // PHYSICAL REVIEW B. - 2006. - V. 74, l. 17.

ISSN/EISSN:

1098-0121 / нет данных

Type:

Article

Abstract:

Based on a quantum dissipation theory of open systems, we present a theoretical study of slow dynamics of magnetization for the ordered state of the molecule-based magnetic complex {[}Mn(hfac)(2)BNOH] composed from antiferromagnetically coupled ferrimagnetic (5/2,1) spin chains. Experimental investigations of the magnetization process in pulsed fields have shown that this compound exhibits a metamagnetic AF-FI transition at a critical field in the order of the interchain coupling. A strong frequency dependence for the ac susceptibility has been revealed in the vicinity of the AF-FI transition and was associated with an AF-FI interface kink motion. We model these processes by a field-driven domain-wall motion along the field-unfavorable chains correlated with a dissipation effect due to a magnetic system-bath coupling. The calculated longitudinal magnetization has a two-step relaxation after the field is switched off and are found in good agreement with the experiment. The relaxation time determined from the imaginary part of the model ac susceptibility agrees qualitatively with that found from the remanent magnetization data.

Author keywords:

нет данных

DOI:

10.1103/PhysRevB.74.174427

Web of Science ID:

ISI:000242409000098

Соавторы в МНС:

Другие поля

Поле	Значение
Month	NOV
Publisher	AMERICAN PHYSICAL SOC
Address	ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Language	English
Article-Number	174427
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
ResearcherID-Numbers	Baranov, Nikolai/J-5042-2013 Ovchinnikov, Alexander/B-9906-2009 INOUE, Katsuya/E-9221-2010
ORCID-Numbers	Baranov, Nikolai/0000-0002-9720-5314 Ovchinnikov, Alexander/0000-0002-1173-9260
Number-of-Cited-References	26
Usage-Count-Since-2013	8
Journal-ISO	Phys. Rev. B
Doc-Delivery-Number	110VI