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Asymmetric switchinglike behavior in the magnetoresistance at low fields in bulk metamagnetic Heusler alloys

Tapas Samanta, Ahmad Us Saleheen, Daniel L. Lepkowski, Alok Shankar, Igor Dubenko, Abdiel Quetz, Mahmud Khan, Naushad Ali, Shane Stadler
2014 Physical Review B  

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https://web.archive.org/web/20180725022003/https://link.aps.org/accepted/10.1103/PhysRevB.90.064412

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A novel physical phenomenon has been observed that resembles a large asymmetric switching-like magnetoresistance at low applied fields in bulk metamagnetic Heusler alloys. A thermally-activated isothermal forward metamagnetic transition with a signature of a pronounced time-dependent relaxation was observed in a bulk B-substituted offstoichiometric Ni-Mn-In Heusler alloy, whereas the reverse metamagnetic transition exhibited the usual athermal behavior with no thermal activation. The asymmetry
more » ... etween the forward and reverse metamagnetic transitions resulted in a large switching-like, low-field magnetoresistance (~16% for a field change of B=0→0.25 T at T=304 K) in the bulk Heusler alloys, Ni 50 Mn 35 In 15-x B x (1≤x≤2).
doi:10.1103/physrevb.90.064412 fatcat:4jdsiphy2nfg5mgc5jsozksghy
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Tapas Samanta, Ahmad Us Saleheen, Daniel L. Lepkowski, Alok Shankar, Igor Dubenko, Abdiel Quetz, Mahmud Khan, Naushad Ali, Shane Stadler. "Asymmetric switchinglike behavior in the magnetoresistance at low fields in bulk metamagnetic Heusler alloys." Physical Review B 90.6 (2014)