Temperature- and magnetic field-dependence of exchange bias in SrCoO2.29 ceramics

Abstract

A cation’s oxidation state in a transition metal oxide may significantly change its physical and chemical properties. In this work, magnetic properties of both cubic SrCoO2.29 and hexagonal SrCoO2.50 ceramics, annealed following a selected yet simple process, have been studied. The SrCoO2.50 ceramics annealed in air displays an unusual paramagnetic property, and the SrCoO2.29 quenched into water shows a short-range ferromagnetic coupling in the antiferromagnetic background. Exchange coupling at the ferromagnetic/antiferromagnetic interfaces brings out an obvious exchange bias effect in the SrCoO2.29 sample. Due to its complicated magnetic states, the exchange bias effect presents strong temperature and cooling field dependences.

Co-existence of magnetic phases in two-dimensional MXene

“…This might be due to decreased contribution from FM phase at elevated temperatures due to spin-misalignment resulting in decrease in the FM-AFM interfacial area due to weakened interfacial interaction thus, reducing the loop-shift along one direction. [38]…”

Effect of spin glass frustration on exchange bias in NiMn/CoFeB bilayers

“…(1) and ( 2), respectively, to find the presence of magnetic frustration in these systems 15,17,18 .…”

Perpendicular exchange bias independent of NiO layer thickness in NiO/CoPt structures with orthogonal spin configuration

“…gained at 10 K. As the temperature increases, the AFM/FM interface coupling decreases. Because the AFM order is diminished due to thermal fluctuations, resulting in the weakening of interfacial interaction and hence reducing the EB field and coercivity [37]. The change of H eb and H c with T for 20 nm and 1 nm thick NiO is plotted in figure 3(d), in which both H eb and H c display a close linear dependence on T. Malozemoff's model successfully predicts the proportional relationship expressed as 1 − T/T N [38].…”