Low-temperature magnetic response of MnSi: Thermomagnetic history effects, metamagnetic transition and the kinetic arrest of the reverse transitionS. B. Roy and M. K. Chattopadhyay
Magnetic and Superconducting Materials Section, Raja Ramanna Centre for Advanced Technology Indore 452013, India
received 4 May 2007; accepted in final form 29 June 2007; published August 2007
published online 25 July 2007
We report results of dc magnetization measurements in the intermetallic compound MnSi, highlighting a magnetic-fieldinduced metamagnetic transition and thermomagnetic history effects. The metamagnetic transition is found to be irreversible in nature; in the field reducing cycle the sample does not go back to the original zero-field cooled magnetic state. We interpret this result in terms of kinetic arrest of the reverse phase transition from the field-induced higher-field magnetic state, and draw analogy with the similar phenomenon observed recently in various classes of magnetic materials including CMR manganites.
75.30.Kz - Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.).
© Europhysics Letters Association 2007