Development of High Magnetic Field Soft X-ray Spectroscopy and Its Application to the Study of Surface and Interface

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  • パルス強磁場軟X線分光による表面・界面磁性研究の開拓
  • パルス キョウジジョウナンXセン ブンコウ ニ ヨル ヒョウメン ・ カイメン ジセイ ケンキュウ ノ カイタク

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Abstract

Magnetic materials are generally synthesized and used as alloys and compounds. They are also stacked as a multilayer film for spintronics device such as a reading-head sensor of a hard disk drive. The evaluation of magnetization is the most fundamental characterization in studies of magnetic materials. Especially, in alloys and compounds involving more than two magnetic elements, a partial magnetization with respect to each element, we call as an element specific magnetization, promises to provide the deeper understanding of their magnetic property. X-ray magnetic circular dichroism (XMCD) in absorption spectroscopy provides an element specific magnetization. As XMCD became increasingly popular, high-magnetic-field environment for XMCD measurements also became very important in order to investigate paramagnetic, antiferromagnetic, and meta-magnetic materials. Under the circumstance, a high-magnetic-field XMCD measurement technique of the soft-X-ray regime has been developed using a non-destructive pulse magnet having capability of generating 40 T at the twin helical undulators beamline, BL25SU, of SPring-8. In this review, we first introduce the concept and the technical features of high magnetic field XMCD and then show recent examples of the experiments.

Journal

  • Hyomen Kagaku

    Hyomen Kagaku 35 (3), 158-163, 2014

    The Surface Science Society of Japan

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