Volume 98, Number 1, April 2012
|Number of page(s)||4|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||05 April 2012|
Ferromagnetic spin ordering in amorphous Co-doped InGaZnO based on the Co–H–Co complex
Department of Cogno-Mechatronics Engineering, Pusan National University - Miryang, 627-706, Republic of Korea
2 Department of Nanomaterials Engineering, Pusan National University - Miryang, 627-706, Republic of Korea
3 Busan center, Korea Basic Science Institute - Busan, 609-735, Republic of Korea
4 Department of Nano Fusion Technology, Pusan National University - Miryang 627-706, Republic of Korea
Accepted: 7 March 2012
We report on ferromagnetic spin ordering in amorphous Co-doped InGaZnO (Co-IGZO) based on hydrogen mediation. The amorphous structure was maintained after hydrogenation using hot isostatic pressing. Changes in the electrical and optical characteristics were attributed to interactions between hydrogen and each element in Co-IGZO. The ferromagnetism of hydrogenated Co-IGZO, induced in the amorphous phase without long-range ordering, was manifested by spin-spin interactions of the Co–H–Co complex acting as an individual magnetic unit, similar to a single molecular magnet. It is suggested that the electron carriers mediate the correlation between Co–H–Co units.
PACS: 75.50.Pp – Magnetic semiconductors / 81.05.Gc – Amorphous semiconductors / 68.60.-p – Physical properties of thin films, nonelectronic
© EPLA, 2012
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