Exchange bias training effect in IrMn-layer/ferromagnetic-ribbon heterostructures probed with magnetoimpedance

• Published in: arXiv.org
• Main Authors: Hajiali, Mohammadreza, Mohammad Javad Kamali Ashtiani, Jamilpanah, Loghman, Mohseni, Majid
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 20.12.2019
• Subjects: Asymmetry; Bias; Exchanging; Ferromagnetism; Heterostructures; Kerr magnetooptical effect; Magnetoimpedance; Physics - Applied Physics; Physics - Mesoscale and Nanoscale Physics; Training
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1912.10032

The exchange-bias training effect in IrMn-layer/ferromagnetic-ribbon heterostructure is studied by performing magnetoimpedance (MI) measurements. Asymmetric, hysteretic and single peak behavior of the MI response and a shift in the MI peak to zero fields accompanied by 52% increase in MI has been detected as the signature of the exchange bias (EB) and training effect (TE), respectively. Also, during the consecutive filed sweep of MI response, both EB field and the degree of asymmetry of MI decrease that is another reason for existence of TE in our sample. The analysis of the magneto-optical Kerr effect (MOKE) and MI behavior establish that Hoffmann s model (Phys. Rev. Lett. 93, 097203 (2004)) is a good description of our experimental data, due to the existence of a strong single cycle TE in our IrMn-layer/ferromagnetic-ribbon system.