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Temperature-dependent magnetization in (Mn, N)-codoped ZnO-based diluted magnetic semiconductors

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Date

2012

Authors

Wu, Kong-Ping
Gu, Shulin
Tang, Kun
Ye, Jiandong
Zhu, Shunming
Zhou, Mengran
Huang, Yourui
Xu, Mingxiang
Zhang, Rong
Zheng, Youdou

Journal Title

Journal ISSN

Volume Title

Publisher

Elsevier

Abstract

The influences of Mn doping on the structural quality of the ZnxMn1-xO:N alloy films have been investigated by XRD. Chemical compositions of the samples (Zn and Mn content) and their valence states were determined by X-ray photoelectron spectrometry (XPS). Hall effect measurements versus temperature for ZnxMn1-xO:N samples have been designed and studied in detail. The ferromagnetic transitions happened at different TC should explain that the magnetic transition in field-cooled magnetization of Zn1-xMnxO:N films at low temperature is caused by the strong pd exchange interactions besides magnetic transition at 46 K resulting from Mn oxide, and that the room temperature ferromagnetic signatures are attributed to the uncompensated spins at the surface of anti-ferromagnetic nano-crystal of Mn-related Zn(Mn)O.

Description

Keywords

Keywords: Alloy film; Chemical compositions; Co-doped; Diluted magnetic semiconductors; Ferromagnetic transitions; Field-cooled magnetizations; Hall effect measurement; Low temperatures; Magnetic transitions; Mn content; Mn oxides; Mn-doping; P-d exchange interacti Diluted magnetic semiconductor; Room-temperature ferromagnetism; Zn xMn 1-xO:N

Citation

URI

http://hdl.handle.net/1885/102830

Collections

ANU Research Publications

Source

Journal of Magnetism and Magnetic Materials

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1016/j.jmmm.2011.12.030

Restricted until

2037-12-31

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