The influence of layer thickness and post annealing on magnetism of pulsed laser deposited ZnO/Co multilayers

ZnO/Co multilayers with different layers have been deposited on silicate (100) substrate by the pulsed laser deposition method. The as-deposited multilayers present the structure of amorphous phase and a narrow hysteresis loop with high saturation magnetization and low coercivity, showing the typica...

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Veröffentlicht in:Journal of magnetism and magnetic materials 2013-11, Vol.345, p.41-47
Hauptverfasser: ZHANYONG WANG, HONGYANG ZHAO, QIWEN YAO, JIAYUE XU, KIMURA, Hideo
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container_issue
container_start_page 41
container_title Journal of magnetism and magnetic materials
container_volume 345
creator ZHANYONG WANG
HONGYANG ZHAO
QIWEN YAO
JIAYUE XU
KIMURA, Hideo
description ZnO/Co multilayers with different layers have been deposited on silicate (100) substrate by the pulsed laser deposition method. The as-deposited multilayers present the structure of amorphous phase and a narrow hysteresis loop with high saturation magnetization and low coercivity, showing the typical soft magnetic behavior. The post annealing at the elevated temperature causes the transformation from as-deposited amorphous phase to crystalline metallic cobalt and ZnO phase, as well as the interdiffusion of different layer forming CoO and ZnCo(2)O(3) phases. The presence of crystalline metallic cobalt phase with ferromagnetic (FM) and cobalt oxide (CoO) phase with antiferromagnetic (AFM) is beneficial to the FM-AFM coupling, resulting in the shift of widening of the hysteresis loop. But an excessively high annealing temperatures leads to the formation of large amount of simple or complex oxides with paramagnetic, antiferromagnetic properties, inducing the decrease of magnetic properties significantly.
doi_str_mv 10.1016/j.jmmm.2013.06.015
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subjects Annealing
Antiferromagnetism
Cobalt
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Crystal structure
Deposition
Exact sciences and technology
Interfacial magnetic properties (multilayers, magnetic quantum wells, superlattices, magnetic heterostructures)
Magnetic properties and materials
Magnetic properties of surface, thin films and multilayers
Multilayers
Phase transformations
Physics
Zinc oxide
title The influence of layer thickness and post annealing on magnetism of pulsed laser deposited ZnO/Co multilayers
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