Metastability in the Magnetic Structure of Ni51Mn33.4In15.6 Heusler Alloy

The metastability of the nonstoichiometric Ni 51 Mn 33.4 In 15.6 Heusler alloy in the first-order transition region is studied using direct adiabatic temperature change (ΔT ad ) measurements for heating and cooling magnetization processes. During the heating process, ΔT ad shows an unusual pronounce...

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Bibliographic Details
Published in:IEEE magnetics letters 2013, Vol.4, p.6000204-6000204
Main Authors: Seyoum, Hailemichael M., Ghahremani, Mohammadreza, ElBidweihy, Hatem, Bennett, Lawrence H., Della Torre, Edward, Johnson, Francis, Min Zuo
Format: Article
Language:English
Subjects:
Coupled phenomena
magnetocaloric effect
Magnetocaloric effects
Ni-Mn-In Heusler alloy
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Summary:The metastability of the nonstoichiometric Ni 51 Mn 33.4 In 15.6 Heusler alloy in the first-order transition region is studied using direct adiabatic temperature change (ΔT ad ) measurements for heating and cooling magnetization processes. During the heating process, ΔT ad shows an unusual pronounced peak at 294 K in low applied magnetic fields. The height of this peak diminishes and eventually vanishes at higher fields. Kinks are as well observed in the 290-295 K temperature interval for both processes. The existence of the peak and kinks is indicative of the complex magnetic dynamics in Ni 51 Mn 33.4 In 15.6 and is attributed to a spin-reorientation transition near the first-order phase transition temperature.
ISSN:1949-307X
1949-3088
DOI:10.1109/LMAG.2013.2267724