Moderate Magnetic Field Induced Large Exchange Bias Effect in Ferrimagnetic 314-Sr3YCo4O10.5 Material

TL;DR

This study demonstrates a large exchange bias effect near room temperature in a ferrimagnetic layered material induced by a moderate magnetic field, highlighting its potential for magnetic applications.

Contribution

We report the discovery of a large exchange bias effect in Sr3YCo4O10.5 induced by moderate cooling fields, which is significant compared to existing materials.

Findings

Exchange bias reaches 5.5 kOe at 4 K

Effect appears near room temperature

Large exchange bias achieved with moderate magnetic field

Abstract

Herein, we report the appearance of a large exchange bias (EB) effect in a moderate cooling field (cooling field, H$_{FC}$ = 1 kOe) for the 314-Sr3YCo4O10.5 material. The exchange bias has started to appear near room temperature and reaches a maximum value of 5.5 kOe at 4 K. The existence of ferrimagnetic clusters in the compensated host in this layered structure originates the large exchange anisotropy. Remarkably, the observed value of moderate magnetic field induced exchange bias field is extremely large in comparison with material systems which are recognized to exhibit giant exchange bias effect. In combination with the feasibility of room temperature application, the appearance of large exchange bias in a moderate cooling field exemplifying the present material system as a promising class of compounds for designing coherent magnetic materials with huge exchange bias in low/moderate magnetic field.