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首页> 外文期刊>精密工学会誌 >AN ESTIMATION METHOD OF FLASH TEMPERATURE AT HEAD/MEDIA INTERFACE IN MAGNETIC RECORDING DEVICES (1ST REPORT) - INTRODUCTION OF SURFACE TEMPERATURE ESTIMATION FORMULA-
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AN ESTIMATION METHOD OF FLASH TEMPERATURE AT HEAD/MEDIA INTERFACE IN MAGNETIC RECORDING DEVICES (1ST REPORT) - INTRODUCTION OF SURFACE TEMPERATURE ESTIMATION FORMULA-

机译：磁记录设备磁头/介质界面处闪烁温度的一种估算方法（第一份报告）-表面温度估算公式的介绍

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摘要

The feasibility is investigated of estimating the flash temperature of intermittent magnetic head/media contacts using the output of a magnetoresistive (MR) micro-sensor embedded in the head. On the assumption that a uniform square heat source moves on the head surface at a high speed, an apporoximate relationship between the surface temperature rise and the sensor output change is presented by applying the profile method in heat conduction theory. In order to calculate the surface temperature using this relationship, it is necessary to know the heat source wideth. In this paper, the width is assumed to be equal to its length that can be observed from the sensor output increasing duration. A finite difference numerical simulation is performed to verify the estimation accuracy of this method for different sensor heights in the range from 2.5 to 20μm. The influences of the sensor surrounding material are also made clear. As a result, in the case of MR sensor NiFe and its surrounding material Al_2 O_3-TiC, the surface temperature can be estimated with an accuracy of about 10 for sensors of less than 10μm high and a heat source duration more than 0.5μs.
机译：研究了使用嵌入磁头中的磁阻（MR）微传感器的输出估算间歇性磁头/介质触点的闪烁温度的可行性。假设均匀的方形热源在头部表面上高速移动，则通过在热传导理论中应用轮廓法，得出表面温度升高与传感器输出变化之间的近似关系。为了利用该关系计算表面温度，需要知道热源的宽度。在本文中，假定宽度等于从传感器输出增加的持续时间可以观察到的长度。进行了有限差分数值模拟，以验证该方法对于2.5至20μm范围内的不同传感器高度的估计精度。还明确了传感器周围材料的影响。结果，在MR传感器NiFe及其周围材料Al_2O_3-TiC的情况下，对于高度小于10μm的传感器和大于0.5μs的热源持续时间，可以以大约10的精度估计表面温度。

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