Exchange bias training in La0.7Sr0.3FeO3/Ni79Fe21 films with native surface oxide: First-order reversal curve analysis
| Autor: | Ping Wu, Zhaohui Wang, B. G. Shen, F. P. Wang, Zhiqiang Liang, Lu-Jia Wang |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Physical Review B. 104 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.104.064440 |
| Popis: | In conventional magnetometry, exchange bias training (EBT) is mostly evaluated through the major magnetization hysteresis loops (MHLs). We here report a study of EBT by using the first-order reversal curves (FORCs) in the heterostructures of ${\mathrm{SrTiO}}_{3}(001)/{\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}{\mathrm{FeO}}_{3}(\mathrm{LSFO})/{\mathrm{Ni}}_{79}{\mathrm{Fe}}_{21}(\mathrm{Py})/{\mathrm{PyO}}_{x}$. It was unraveled that the training effect occurs once after exceeding the left coercivity of the first MHL, while the magnetic coupling from the ultrathin native oxide (${\mathrm{PyO}}_{x}$) mainly contributes to an exchange springlike behavior. Besides for the first MHL, the FORCs corresponding to the second MHL and the quasiequilibrium stage were collected, respectively, which provide a detailed picture of how the magnetization reversal evolves in the training process. |
| Databáze: | OpenAIRE |
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