Electron beam reduction induced self-assembly growth of Co/CoO nanocomposite materials

被引：10

作者：

Ding, Shilei ^{[1
]}

Xue, Mingzhu ^{[1
]}

Wu, Rui ^{[2
]}

Lai, Youfang ^{[1
]}

Men, Yong ^{[3
]}

Kong, Xiangdong ^{[3
]}

Han, Li ^{[3
]}

Han, Jingzhi ^{[1
,4
]}

Yang, Wenyun ^{[1
,4
]}

Yang, Yingchang ^{[1
]}

Du, Honglin ^{[1
,4
]}

Wang, Changsheng ^{[1
,4
]}

Yang, Jinbo ^{[1
,4
,5
]}

机构：

[1] Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China

[2] Univ Cambridge, Dept Mat Sci & Met, 27 Charles Babbage Rd, Cambridge CB3 0FS, England

[3] Chinese Acad Sci, Inst Elect Engn, Dept Micronano Fabricat Technol, Beijing 100190, Peoples R China

[4] Beijing Key Lab Magnetoelect Mat & Devices, Beijing 100871, Peoples R China

[5] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 744卷

基金：

中国国家自然科学基金;

关键词：

Electron beam irradiation; Reduction growth; Oxygen vacancies; Blocking temperature; EXCHANGE BIAS; NANOPARTICLES; DEPENDENCE; SHAPE; SIZE; COERCIVITY; ANISOTROPY; BIFEO3; FILMS; GOLD;

D O I：

10.1016/j.jallcom.2018.02.033

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Electron beam irradiation (EBI) technology has been widely used in industrial fields during the welding process, and the instantaneous high temperature produced during this process is a significant advantage for the synthesis of metallic materials. Here, we report a method to manufacture metal/oxide nanocomposite materials by EBI using oxide films. The CoO films are first prepared by a pulsed-laser deposition technique, and the as-prepared films are treated by EBI with different electron doses. CoO can be controllably reduced to metallic Co, and a Co/CoO nanocomposite is produced with a large number of oxygen vacancies after EBI. The self-assembled well-dispersed Co nanoparticles are formed on the film surface, and their sizes can be controlled by the electron dose and irradiation time. The obtained Co/CoO composited nanoparticle films exhibit an exchange bias effect, and their blocking temperature can be modified by variations in the electron dose and time. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：615 / 620

页数：6

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