Galvanomagnetic effects and manipulation of antiferromagnetic interfacial uncompensated magnetic moment in exchange-biased bilayers
| Autor: | Zhou, X., Ma, L., Shi, Z., Fan, W. J., Evans, R. F. L., Chantrell, R. W., Mangin, S., Zhang, H. W., Zhou, S. M. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | In this work, IrMn$_{3}$/insulating-Y$_{3}$Fe$_{5}$O$_{12}$ exchange-biased bilayers are studied. The behavior of the net magnetic moment $\Delta m_{AFM}$ in the antiferromagnet is directly probed by anomalous and planar Hall effects, and anisotropic magnetoresistance. The $\Delta m_{AFM}$ is proved to come from the interfacial uncompensated magnetic moment. We demonstrate that the exchange bias and rotational hysteresis are induced by the irreversible switching of the $\Delta m_{AFM}$. In the training effect, the $\Delta m_{AFM}$ changes continuously. This work highlights the fundamental role of the $\Delta m_{AFM}$ in the exchange bias and facilitates the manipulation of antiferromagnetic spintronic devices. Comment: 5 pages, 4 figures |
| Databáze: | arXiv |
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