Room temperature ferromagnetism of amorphous MgO films prepared by pulsed laser deposition

Jing Li; Yinzhu Jiang; Guohua Bai; Tianyu Ma; Deren Yang; Youwei Du; Mi Yan

doi:10.1007/s00339-013-7922-x

Room temperature ferromagnetism of amorphous MgO films prepared by pulsed laser deposition

Jing Li
, Yinzhu Jiang
, Guohua Bai
, Tianyu Ma
, Deren Yang
, Youwei Du
, Mi Yan

Zhejiang University
CAS - Suzhou Institute of Nano-Tech and Nano-Bionics
Nanjing University

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

21 Scopus citations

Abstract

Amorphous MgO thin films were prepared by pulsed laser deposition (PLD) under various oxygen pressures. The structural, magnetic, and optical properties of the films were investigated. All as-deposited samples exhibit room temperature ferromagnetism, which depend strongly on oxygen pressure. It is found that the saturation magnetization (M _s) initially increases with the oxygen pressure, the maximum M _s of 8.57 emu/cm³ is obtained for the MgO film deposited under an oxygen pressure of 2 mTorr. However, the M _s significantly reduces at higher oxygen pressures. Further X-ray photoelectron spectroscopy and photoluminescence demonstrate that the long-range magnetic order in amorphous MgO films can be attributed to the nonstoichiometry effect and the presence of Mg vacancies.

Original language	English
Pages (from-to)	997-1001
Number of pages	5
Journal	Applied Physics A: Materials Science and Processing
Volume	115
Issue number	3
DOIs	https://doi.org/10.1007/s00339-013-7922-x
State	Published - Jun 2014
Externally published	Yes

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title = "Room temperature ferromagnetism of amorphous MgO films prepared by pulsed laser deposition",

abstract = "Amorphous MgO thin films were prepared by pulsed laser deposition (PLD) under various oxygen pressures. The structural, magnetic, and optical properties of the films were investigated. All as-deposited samples exhibit room temperature ferromagnetism, which depend strongly on oxygen pressure. It is found that the saturation magnetization (M s) initially increases with the oxygen pressure, the maximum M s of 8.57 emu/cm3 is obtained for the MgO film deposited under an oxygen pressure of 2 mTorr. However, the M s significantly reduces at higher oxygen pressures. Further X-ray photoelectron spectroscopy and photoluminescence demonstrate that the long-range magnetic order in amorphous MgO films can be attributed to the nonstoichiometry effect and the presence of Mg vacancies.",

author = "Jing Li and Yinzhu Jiang and Guohua Bai and Tianyu Ma and Deren Yang and Youwei Du and Mi Yan",

year = "2014",

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doi = "10.1007/s00339-013-7922-x",

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T1 - Room temperature ferromagnetism of amorphous MgO films prepared by pulsed laser deposition

AU - Li, Jing

AU - Jiang, Yinzhu

AU - Bai, Guohua

AU - Ma, Tianyu

AU - Yang, Deren

AU - Du, Youwei

AU - Yan, Mi

PY - 2014/6

Y1 - 2014/6

N2 - Amorphous MgO thin films were prepared by pulsed laser deposition (PLD) under various oxygen pressures. The structural, magnetic, and optical properties of the films were investigated. All as-deposited samples exhibit room temperature ferromagnetism, which depend strongly on oxygen pressure. It is found that the saturation magnetization (M s) initially increases with the oxygen pressure, the maximum M s of 8.57 emu/cm3 is obtained for the MgO film deposited under an oxygen pressure of 2 mTorr. However, the M s significantly reduces at higher oxygen pressures. Further X-ray photoelectron spectroscopy and photoluminescence demonstrate that the long-range magnetic order in amorphous MgO films can be attributed to the nonstoichiometry effect and the presence of Mg vacancies.

AB - Amorphous MgO thin films were prepared by pulsed laser deposition (PLD) under various oxygen pressures. The structural, magnetic, and optical properties of the films were investigated. All as-deposited samples exhibit room temperature ferromagnetism, which depend strongly on oxygen pressure. It is found that the saturation magnetization (M s) initially increases with the oxygen pressure, the maximum M s of 8.57 emu/cm3 is obtained for the MgO film deposited under an oxygen pressure of 2 mTorr. However, the M s significantly reduces at higher oxygen pressures. Further X-ray photoelectron spectroscopy and photoluminescence demonstrate that the long-range magnetic order in amorphous MgO films can be attributed to the nonstoichiometry effect and the presence of Mg vacancies.

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DO - 10.1007/s00339-013-7922-x

M3 - 文章

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JO - Applied Physics A: Materials Science and Processing

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ER -

Room temperature ferromagnetism of amorphous MgO films prepared by pulsed laser deposition

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