Tuning the exchange bias effect via thermal treatment temperature in bulk Ni₅₀Mn₄₂In₃Sb₅ Heusler alloys

Abstract

An interesting evolution of spin glass behaviors and the corresponding exchange bias effects were observed by quenching Ni50Mn42In3Sb5 Heusler alloys at different temperatures. When the alloy is quenched at 1173 K, it will freeze from antiferromagnetic to spin glass at low temperature under an external magnetic field, creating a giant exchange bias field up to 9063 Oe through the pinning effect. In another case, the superparamagnetic in alloys quenched at 473 K will transform to superspin glass after zero-field cooling at low temperatures instead. As a result, a spontaneous exchange bias effect up to 581 Oe can be achieved.

Atomic-Scale Structural Properties in NiCo₂O₄/CuFe₂O₄ Bilayer Heterostructures on (001)-MgAl₂O₄ Substrate Regulated by Film Thickness

“…It is very critical to manipulate the formation of planar defects APBs in a controllable and reliable manner for the novel device applications [22][23][24]. Previous studies on the exchange bias effect have mostly focused on alloy and perovskite heterojunctions [25][26][27][28][29]. However, the microstructural properties related to exchange bias effect in bilayer spinel oxide heterojunctions has been rarely reported.…”