We have studied the reliability of a near-field transducer (NFT) embedded in a magnetic recording slider used for heat-assisted magnetic recording (HAMR) in hard disk drives with a linear velocity of 20 m/s. The NFT head structure and the disk are separated by an air film of 2 nm thickness. In this article, the magnetic write width and amplitude of the written magnetic signal on the disk are used as a “health monitor” for the reliability of the NFT under long-term thermal exposure. The results show that the reliability of the NFT head structure sharply decreases with increasing temperature of the NFT but depends only slightly on the media temperature.

中文翻译：

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热辅助磁记录 (HAMR) 中的温度感应近场传感器 (NFT) 故障

我们研究了嵌入磁记录滑块中的近场换能器 (NFT) 的可靠性，该滑块用于线速度为 20 m/s 的硬盘驱动器中的热辅助磁记录 (HAMR)。NFT 磁头结构和磁盘被 2 纳米厚的空气膜隔开。在本文中，磁盘上写入的磁信号的磁写入宽度和幅度被用作 NFT 在长期热暴露下的可靠性的“健康监视器”。结果表明，NFT 磁头结构的可靠性随着 NFT 温度的升高而急剧下降，但仅略微依赖于介质温度。