Volume 79, Number 4, August 2007
Article Number 47007
Number of page(s) 5
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
Published online 25 July 2007
EPL, 79 (2007) 47007
DOI: 10.1209/0295-5075/79/47007

Low-temperature magnetic response of MnSi: Thermomagnetic history effects, metamagnetic transition and the kinetic arrest of the reverse transition

S. 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-field$\hbox{--} $induced 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