稀土Dy、退火对Dyx(Co40Ag60)100-x颗粒膜的结构与巨磁电阻效应的影响

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稀土Dy、退火对Dyx(Co40Ag60)100-x颗粒膜的结构与巨磁电阻效应的影响

材料科学与工程 | 更新时间：2023-11-14

- 稀土Dy、退火对Dyx(Co40Ag60)100-x颗粒膜的结构与巨磁电阻效应的影响
- Influence of Dy content and annealing temperature on the structure and giant magnetoresistance of Dyx(Co40Ag60)100-x granular films
- 工程科学与技术 2011年43卷第1期页码：214-218
- 作者机构：
  
  桂林电子科技大学
- 作者简介：
- 基金信息：
  
  国家自然科学基金
- DOI：
  中图分类号：
- 纸质出版日期：2011，
  
  网络出版日期：2010-4-12，
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成钢.稀土Dy、退火对Dyx(Co40Ag60)100-x颗粒膜的结构与巨磁电阻效应的影响[J].工程科学与技术,2011,43(1):214-218.

Cheng Gang. Influence of Dy content and annealing temperature on the structure and giant magnetoresistance of Dyx(Co40Ag60)100-x granular films[J]. Advanced Engineering Sciences, 2011,43(1):214-218.
成钢.稀土Dy、退火对Dyx(Co40Ag60)100-x颗粒膜的结构与巨磁电阻效应的影响[J].工程科学与技术,2011,43(1):214-218. DOI：

Cheng Gang. Influence of Dy content and annealing temperature on the structure and giant magnetoresistance of Dyx(Co40Ag60)100-x granular films[J]. Advanced Engineering Sciences, 2011,43(1):214-218. DOI：

摘要

中文摘要: 采用磁控溅射法制备了Dyx(Co40Ag60)100-x颗粒膜。X射线衍射实验结果表明：Dyx(Co40Ag60)100-x颗粒膜的晶体结构具有一定的择优取向

退火温度升高能够促进这种择优取向并加速Ag颗粒的聚集生长和Ag中的Co发生相分离..稀土元素Dy起到细化晶粒的作用

并且阻碍晶面择优取向的进程

导致薄膜结构中的晶界增多从而引起薄膜电阻变大；巨磁电阻效应(GMR)测量结果表明：对所有不同成分薄膜样品当退火温度高于250℃时，GMR值是趋于减小的。由于掺杂稀土元素Dy会引起薄膜电阻的增大从而导致GMR效应减小的趋势，但少量的Dy元素(x=0.7)和适当的退火处理即能保持GMR效应的稳定性又能提高它对磁场的灵敏度，GMR和S的最大值分别为-18%和1.5×10-4 (A/m)-1。

Abstract

Abstract:Dyx（Co40Ag60）100-x (x=0

0.7

1.4

2.1

2.8

3.5) granular films have been prepared by DC magneto controlled sputtering method. The XRD data indicated that Dyx（Co40Ag60）100-x films favors the (111) plane preferential orientation. The high annealing temperature t can promote the (111) plane of Ag preferential orientation and Co dissolving in Ag to separate from Ag and accelerate grain growing. Dy element plays the role of a grain refiner and retards the (111) plane preferential orientation result in increasing grains boundary and resistance of films. Magnetic measurements indicated that the value of GMR decreases of all films when annealing temperature is higher 250℃ because of increasing of resistance of films

but it can enhance sensitivityof films doped small Dy element. For small amount of addition Dy to CoAg granular films and proper heat treatment

Dy element can keep the value of GMR a constant and enhance sensitivity. Both maximum values of GMR and sensitivity are -18% and 1.5×10-4 (A/m)-1

respectively.

关键词

巨磁电阻效应颗粒膜磁性颗粒

Keywords

Giant magnetoresistanceGranular filmsMagnetic particle

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