| Title | Enhancement of exchange bias and training effect in ion-beam sputtered Fe46Mn54/Ni81Fe19bilayers |
| Publication Type | Journal Article |
| Year of Publication | 2014 |
| Authors | Fulara, H., Chaudhary S., Kashyap S.C., and Granville S. |
| Journal | Applied Physics Letters |
| Volume | 104 |
| Issue | 25 |
| Date Published | 2014 |
| ISSN | 00036951 (ISSN) |
| Keywords | Bi-layer, Exchange bias, Training effects |
| Abstract | We present a remarkable enhancement by 300% of the exchange-bias field at room temperature, without affecting the coercivity value, via optimum magnetic annealing (250 °C/3 kOe) in ion-beam sputtered FeMn(30 nm)/NiFe(10 nm) bilayers. This specific behavior has been attributed to a higher degree of γ-FeMn(111) orientation that offers more interfacial FeMn moments to get pinned with the moments of the adjacent NiFe layer. Unlike the absence of training effect at room temperature, a pronounced training effect and an accompanying magnetization reversal asymmetry are evidenced upon field cooling below 50 K due to the presence of biaxial exchange induced anisotropy across the interdiffused FeMn/NiFe interface. The present findings not only have technological significance but also are of relevance to the understanding of interfacial spin disorder and frustration in these exchange-biased systems. © 2014 AIP Publishing LLC. |
| URL | http://www.scopus.com/inward/record.url?eid=2-s2.0-84907663464&partnerID=40&md5=7bbfc3497b078bbc4df1b091d4a62f66 |
| DOI | 10.1063/1.4863306 |
