Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5490462 | Journal of Magnetism and Magnetic Materials | 2017 | 20 Pages |
Abstract
Coupling at the interfaces between antiferromagnetic and ferromagnetic constituents is known to be responsible for the exchange-bias effect, where external stimulus like temperature, electric or magnetic fields are supposed to influence the associated phenomenology. In this paper, we prepare the polycrystalline Co2TiO4 and investigate its temperature- and field-dependent magnetization, from which an unusual exchange-bias effect associated with magnetic reversals is extracted. At low temperature, a continuous crossover from negative to positive exchange-bias fields can be obtained with increment of the cooling magnetic field, showing a magnetically tunable effect. The bipolar switching of exchange-bias field in this compound depends on the relative orientation between Co2+ and [Co3+Ti3+] magnetic moments.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
A. Wei, S. Tao, Y. Fang, Z.D. Han, B. Qian, X.F. Jiang, H. Zhou, R.J. Tang, D.H. Wang,