Dynamics and scaling of low-frequency hysteresis loops in nanomagnets
文献类型：期刊论文
| 作者 | Z. H. Zhu ; Y. J. Sun ; Q. Zhang ; J. M. Liu |
| 刊名 | Physical Review B
 |
| 出版日期 | 2007 |
| 卷号 | 76期号:1 |
| 关键词 | precessional magnetization reversal self-organized criticality model spin systems films field |
| ISSN号 | 1098-0121 |
| 中文摘要 | The magnetic hysteresis and its area for two-dimensional nanomagnets with precessional magnetization reversal, driven by ac magnetic field of frequency f and amplitude H-0, are investigated by numerically solving the Landau-Lifshitz-Gilbert equation. Irregular hysteresis loops are observed when f is low and H-0 is high, indicating the significant contribution of nonadiabatic precession to the magnetization reversal. The frequency dispersion of hysteresis area A(f) shows the double-peaked pattern with the low-f peak caused by the precessional magnetization reversal and the high-f peak originating from the quasichaotic oscillations of the spin precession. The power-law scaling behavior of the hysteresis dispersion, i.e., A proportional to H(0)(lambda)f(beta) with exponents lambda=0.60 and beta=0.50, is observed in the low-f range limit. We present the one-parameter dynamic scaling on the low-f hysteresis dispersions over a broad range of H-0, demonstrating the scalability of the hysteresis dispersion and thus the existence of the unique characteristic time for magnetization reversal process in nanomagnets, given the field amplitude H-0. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/34116]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Z. H. Zhu,Y. J. Sun,Q. Zhang,et al. Dynamics and scaling of low-frequency hysteresis loops in nanomagnets[J]. Physical Review B,2007,76(1). |
| APA | Z. H. Zhu,Y. J. Sun,Q. Zhang,&J. M. Liu.(2007).Dynamics and scaling of low-frequency hysteresis loops in nanomagnets.Physical Review B,76(1). |
| MLA | Z. H. Zhu,et al."Dynamics and scaling of low-frequency hysteresis loops in nanomagnets".Physical Review B 76.1(2007). |
入库方式： OAI收割
来源：金属研究所
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