Lorentz Microscopy Study on Magnetization Reversal Process in Single-Domain State in Perovskite-Type Manganite

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概要

• 論文の詳細を見る

• The phenomenon of ferromagnetic domain switching, which occurred in a colossal magnetoresistive manganite La0.25Pr0.375Ca0.375MnO3, was studied by sophisticated transmission electron microscopy techniques. Lorentz microscopy observations revealed the size dependence of the magnetization reversal behaviors. A small single-domain (70 nm) exhibited a direct switching process to another single-domain form, while a large single domain (150 nm) showed a multiple-domain configuration before the transformation to another single-domain state. We also demonstrated significant magnetic interaction in an assembly of single domains; i.e., neighboring single domains underwent magnetization reversal simultaneously. The results provide useful information for a deeper understanding of the switching process in a single-domain state, which can be observed in many advanced materials related to magnetic data storage media.

• 2010-06-25

著者

• Xia Weixing

  Institute Of Multidisciplinary Research For Advanced Materials Tohoku University

• Daisuke Shindo

  Okinawa Institute of Science and Technology, Kunigami, Okinawa 904-0411, Japan

• Mamishin Shuichi

  Okinawa Institute of Science and Technology, Kunigami, Okinawa 904-0411, Japan

• Kasai Hiroto

  Okinawa Institute of Science and Technology, Kunigami, Okinawa 904-0411, Japan

• Yasukazu Murakami

  Okinawa Institute of Science and Technology, Kunigami, Okinawa 904-0411, Japan

• Shigeo Mori

  Department of Material Science, Osaka Prefecture University, Sakai 599-8531, Japan

• Akira Tonomura

  Okinawa Institute of Science and Technology, Kunigami, Okinawa 904-0411, Japan

• Shuichi Mamishin

  Okinawa Institute of Science and Technology, Kunigami, Okinawa 904-0411, Japan

• Hiroto Kasai

  Okinawa Institute of Science and Technology, Kunigami, Okinawa 904-0411, Japan

• Weixing Xia

  Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan

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