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在透明介质上进行超快速非热光磁记录

A Stupakiewicz¹, K Szerenos¹, D Afanasiev²

¹Laboratory of Magnetism, Faculty of Physics, University of Bialystok, 1L Ciolkowskiego, 15-245 Bialystok, Poland.

|January 19, 2017

概括

科学家们通过使用介电替代石榴石实现了超快的全光学光磁记录. 这种方法使用单一的激光脉冲来确定性地控制磁位,

科学领域:

材料科学
磁力学
光学学

背景情况:

对于基本的磁性和数据存储来说,快速控制磁性状态和最小的热量至关重要.
现有的金属方法依赖于接近基里温度的激光诱导加热,从而限制了效率.
在磁性介电器中提出了全光学切换,但尚未用于记录.

研究的目的:

在介电材料中展示和描述超快的全光学光磁记录.
通过激光脉冲来研究一种新的磁位操纵机制.
为了实现高速磁记录,显著减少热量产生.

主要方法:

使用过电替代石榴石的透明薄膜.
使用单个,线性偏振的五秒激光脉冲来激发离子中的d-d转换.
通过改变激光脉冲的偏向来编写磁位来操纵网络磁化.

主要成果:

在介电石榴石中实现了全光学磁性记录.
显示超快的读写磁记录事件在20小秒内.
观察到前所未有的低热量产生,每立方厘米少于6焦耳.

结论:

在介电介质中建立全光磁记录的新范式.
经过证明的光磁机制为现有方法提供了更快,更节能的替代方案.
这一突破对未来的高速低热磁性数据存储技术有重大影响.

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