Japan Long-Term Visit: Micromagnetic Analysis of the Staticsand Dynamics of Magnetization in Thin Ferromagnetic Films with Applications to Magnetic Memories and Sensors

这笔奖金将支持霍尼韦尔固态电子中心的Bharat B.Pant博士为期12个月的长期访问，访问日本是为了一个合作研究项目，该项目由九州大学电机系的Kimiide Matsuyama教授和Ichiro Sasada教授以及九州工业大学电机系的Yamasaki二郎教授参与。这项拟议的研究涉及对磁阻传感器中使用的长条铁磁薄膜的响应进行建模。在这些传感器中，感应场的变化会导致条带的电阻发生变化。这项研究将针对两种类型的使用磁性薄膜的器件，即垂直Bloch线存储器和薄膜磁性传感器。提出的工作既具有理论性质，又具有计算性质。这项研究将与松山教授的垂直Bloch线记忆努力、佐田教授使用非晶铁磁条作为扭矩传感器的工作以及山崎教授对薄膜磁化动力学的实验研究一起进行。提出的研究具有重要的科学价值和实用价值。这将为我们对薄膜中磁性的静力学和动力学的基本理论和实验理解做出重要贡献。该项目的研究可以提高设计薄膜磁阻传感器的能力，目前正在研究将其用于磁记录磁盘文件。这可能会对磁盘驱动器行业产生重要的经济影响。所有的研究人员都是各自领域的专家。九州大学和九州理工学院正在进行这方面的实验工作。九州大学在垂直布洛赫线记忆和非晶磁性薄膜的实验方面处于领先地位。由于霍尼韦尔在这一领域没有实验努力，潘特教授在这所大学进行他的研究是有利的。相信合作将非常成功，这项研究将导致研究人员之间继续合作。

This award will support a 12 month long-term visit by Dr. Bharat B. Pant of the Solid State Electronics Center at Honeywell, Inc. to visit Japan for a cooperative research project involving Professors Kimihide Matsuyama and Ichiro Sasada of the Department of Electrical Engineering at Kyushu University and Professor Jiro Yamasaki of the Department of Electrical Engineering at Kyushu Institute of Technology. The proposed research involves modeling of the response of long strips of ferromagnetic film used in magnetoresistive sensors. In these sensors a change in the sensed field produces a change in the resistance of the strip. The research will be targeted towards two types of devices which use magnetic thin films, i.e. verticle Bloch line memory and thin film magnetic sensors. The work proposed is of both a theoretical and computational nature. The research will be carried out in conjunction with Professor Matsuyama's verticle Bloch line memory effort, Professor Sasada's work in the use of amorphous ferromagnetic ribbons as torque sensors and Professor Yamasaki's research into experimental investi- gations of the dynamics of magnetization in thin films. The proposed research has significant scientific as well as practical value. It will provide an important contribution to our basic theoretical and experimental understanding of the statics and dynamics of magnetism in thin films. Research resulting from this project could improve the ability to design thin film magneto-resistive sensors which are currently being studied for use in magnetic recording disk files. This could have an important economic impact on the disk drive industry. All of the researchers are experts in their specific areas. Both Kyushu University and the Kyushu Institute of Technology have ongoing experimental efforts taking place in this area. Kyushu University is well advanced in experiments in vertical Bloch line memory and amorphous magnetic films. Since Honeywell has no experimental effort in this area it is advantageous for Professor Pant to carry out his research at this University. It is believed that the collaborations will be very successful and that this research will result in continued cooperation among the researchers.