Eur. Phys. J. B 84, 219-225 (2011)
https://doi.org/10.1140/epjb/e2011-20365-9

Regular Article

Effect of chirality on domain wall dynamics in molecular ferrimagnet [Mn^II(HL-pn)(H₂O)][Mn^III(CN)₆]·2H₂O

¹ Institute of Problems of Chemical Physics, 1, Ak. Semenova st., 142432 Chernogolovka, Russia
² RTC ‘PCMS’ Taras Shevchenko University of Kyiv and NAS of Ukraine, 64, Vladimirskaya str., 01033 Kiev, Ukraine

^a e-mail: mushenokf@ya.ru

Received: 13 May 2011
Received in final form: 23 October 2011
Published online: 16 November 2011

Abstract

In this paper we distinguish the contributions of switching, slide, creep and Debye relaxation modes of the domain wall dynamics to the low-frequency magnetic properties of chiral and racemic [Mn^II(HL-pn)(H₂O)][Mn^III(CN)₆]·2H₂O molecular ferrimagnets. We demonstrate that crystal and spin chirality affects the characteristic transition temperatures between different modes. In chiral crystals, transitions to the creep and Debye relaxation modes were observed at T = 7 K and 5 K, whereas in racemic crystals the same transitions occurred at higher temperatures T = 13 K and 9 K, respectively. Difference of the Peierls relief in chiral and racemic crystals is a possible reason of the chirality effect on the domain walls dynamics.