Structural defects-mediated room-temperature ferromagnetism in Co-doped SnO2 insulating films

X. F. Liu; W. M. Gong; Javed Iqbal; B. He; R. H. Yu

doi:10.1016/j.tsf.2009.05.008

Structural defects-mediated room-temperature ferromagnetism in Co-doped SnO₂ insulating films

X. F. Liu
, W. M. Gong
, Javed Iqbal
, B. He
, R. H. Yu^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

Co-doped SnO₂ insulating films with different crystal quality were fabricated using magnetron sputtering. X-ray photoelectron spectroscopy and X-ray absorption near-edge structure spectrum reveal a solid solution of Co dopants in SnO₂ lattice, where Co is in 2+ oxidation state and substitutes for Sn⁴⁺. The as-grown films with different crystallinity exhibit clearly room-temperature ferromagnetism, and the films with more structural defects show higher saturated magnetic moment. With the increase of annealing time, the crystallinity of the films is improved and the defects decrease, leading to the decrease or disappearance of ferromagnetism in the films. The results show that the ferromagnetism in Co-doped SnO₂ films is intrinsic and can be considerably influenced by the concentration of structural defects.

Original language	English
Pages (from-to)	6091-6095
Number of pages	5
Journal	Thin Solid Films
Volume	517
Issue number	21
DOIs	https://doi.org/10.1016/j.tsf.2009.05.008
State	Published - 1 Sep 2009
Externally published	Yes

Keywords

Bound magnetic polarons
Co-doped SnO
Diluted magnetic oxides
Structural defect

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10.1016/j.tsf.2009.05.008

Cite this

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title = "Structural defects-mediated room-temperature ferromagnetism in Co-doped SnO2 insulating films",

abstract = "Co-doped SnO2 insulating films with different crystal quality were fabricated using magnetron sputtering. X-ray photoelectron spectroscopy and X-ray absorption near-edge structure spectrum reveal a solid solution of Co dopants in SnO2 lattice, where Co is in 2+ oxidation state and substitutes for Sn4+. The as-grown films with different crystallinity exhibit clearly room-temperature ferromagnetism, and the films with more structural defects show higher saturated magnetic moment. With the increase of annealing time, the crystallinity of the films is improved and the defects decrease, leading to the decrease or disappearance of ferromagnetism in the films. The results show that the ferromagnetism in Co-doped SnO2 films is intrinsic and can be considerably influenced by the concentration of structural defects.",

keywords = "Bound magnetic polarons, Co-doped SnO, Diluted magnetic oxides, Structural defect",

author = "Liu, \{X. F.\} and Gong, \{W. M.\} and Javed Iqbal and B. He and Yu, \{R. H.\}",

year = "2009",

month = sep,

day = "1",

doi = "10.1016/j.tsf.2009.05.008",

language = "英语",

volume = "517",

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journal = "Thin Solid Films",

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TY - JOUR

T1 - Structural defects-mediated room-temperature ferromagnetism in Co-doped SnO2 insulating films

AU - Liu, X. F.

AU - Gong, W. M.

AU - Iqbal, Javed

AU - He, B.

AU - Yu, R. H.

PY - 2009/9/1

Y1 - 2009/9/1

N2 - Co-doped SnO2 insulating films with different crystal quality were fabricated using magnetron sputtering. X-ray photoelectron spectroscopy and X-ray absorption near-edge structure spectrum reveal a solid solution of Co dopants in SnO2 lattice, where Co is in 2+ oxidation state and substitutes for Sn4+. The as-grown films with different crystallinity exhibit clearly room-temperature ferromagnetism, and the films with more structural defects show higher saturated magnetic moment. With the increase of annealing time, the crystallinity of the films is improved and the defects decrease, leading to the decrease or disappearance of ferromagnetism in the films. The results show that the ferromagnetism in Co-doped SnO2 films is intrinsic and can be considerably influenced by the concentration of structural defects.

AB - Co-doped SnO2 insulating films with different crystal quality were fabricated using magnetron sputtering. X-ray photoelectron spectroscopy and X-ray absorption near-edge structure spectrum reveal a solid solution of Co dopants in SnO2 lattice, where Co is in 2+ oxidation state and substitutes for Sn4+. The as-grown films with different crystallinity exhibit clearly room-temperature ferromagnetism, and the films with more structural defects show higher saturated magnetic moment. With the increase of annealing time, the crystallinity of the films is improved and the defects decrease, leading to the decrease or disappearance of ferromagnetism in the films. The results show that the ferromagnetism in Co-doped SnO2 films is intrinsic and can be considerably influenced by the concentration of structural defects.

KW - Bound magnetic polarons

KW - Co-doped SnO

KW - Diluted magnetic oxides

KW - Structural defect

UR - https://www.scopus.com/pages/publications/67249088897

U2 - 10.1016/j.tsf.2009.05.008

DO - 10.1016/j.tsf.2009.05.008

M3 - 文章

AN - SCOPUS:67249088897

SN - 0040-6090

VL - 517

SP - 6091

EP - 6095

JO - Thin Solid Films

JF - Thin Solid Films

IS - 21

ER -

Structural defects-mediated room-temperature ferromagnetism in Co-doped SnO₂ insulating films

Abstract

Keywords

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