Title :
Observation of Large Exchange Bias Effect in Bulk Mn50Ni41Sn9 Heusler Alloy
Author :
Sharma, Jaibir ; Suresh, K.G.
Author_Institution :
Dept. of Phys., IIT Bombay, Mumbai, India
Abstract :
An experimental study on exchange bias (EB) and magnetic properties of bulk Mn50Ni41Sn9 Heusler alloy has been performed using magnetization measurements. A large value of EB field of 1165 Oe in the martensite phase has been observed after 10 kOe field cooling process. The observed double shifted hysteresis loop after zero field cooling and a large training effect strongly suggest the presence of EB phenomenon in this alloy. The reason for the large EB field may be an additional antiferromagnetic exchange interaction present between Mn atoms on Ni sites and the Mn atoms on the regular sites. The effect of various parameters, such as temperature and cooling field, on the EB properties has also been studied.
Keywords :
antiferromagnetic materials; exchange interactions (electron); magnetic cooling; magnetic hysteresis; manganese alloys; martensitic structure; martensitic transformations; nickel alloys; tin alloys; Mn atoms; Mn50Ni41Sn9; Ni sites; antiferromagnetic exchange interaction; bulk Heusler alloy; double shifted hysteresis loop; field cooling process; large exchange bias effect; magnetic properties; magnetization measurements; martensite phase; zero field cooling; Cooling; Frequency modulation; Magnetic anisotropy; Magnetic hysteresis; Magnetization; Metals; Temperature measurement; Exchange bias (EB) effect; Heusler alloys; martensitic transition;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2014.2325779
