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Microscopic Magnetization Process of Tb-Co Film by Magnetic Compton Scattering

Jul. 28, 2011

Japan Atomic Energy Agency, Gunma University and Japan Synchrotron Radiation Research Institute have succeeded in obtaining spin selective and orbital selective magnetic hysteresis loops of an amorphous Tb43Co57 alloy film by magnetic Compton scattering.

Amorphous rare earth - transition metal alloy is a candidate material for high density recording media and spin electronic devices. Traditionally, material for magnetic material device is developed based on macroscopic magnetic property measurements which investigate macroscopic properties. We have succeeded in measuring spin selective magnetic hysteresis (SSMH) loop by magnetic Compton scattering at synchrotron radiation facility SPring-8. Moreover we have succeeded obtaining orbital selective magnetic hysteresis (OSMH) loop by combining with result of macroscopic magnetic hysteresis loop. It was found that the SSMH, OSMH, and macroscopic hysteresis loops show different curve each other and spin component is softer than orbital component under magnetic field. This difference can be effect recording speed of devices. These results tell that microscopic point view can be informative for developing magnetic devices such as spin electronic devices.

This work has been published in Applied Physics Express 4 (2011) 083002.

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