Synthesis, structure and exchange bias in Cr2O3/CrO2/Cr2O5 particles
Synthesis, structure and exchange bias in Cr2O3/CrO2/Cr2O5 particles
复制标题
Cr2O3/CrO2/Cr2O5 颗粒的合成、结构和交换偏向
DOI：
10.1016/j.tsf.2011.03.097
复制
发表时间：
2011-09
期刊：
影响因子：
2.1
通讯作者：
J. J. Liu
中科院分区：
文献类型：
--
作者：
P. Z. Si;H. X. Wang;W. Jiang;J. G. Lee;C. J. Choi;J. J. Liu
报道了一种新型的具有Cr{sub2}O{sub3}/CrO{sub2}/Cr{sub2}O{sub5}界面的交换偏置体系的合成、结构和磁性能。通过在空气中烧结CrO{sub3}制备了具有混合铬价的氧化铬颗粒。X-射线衍射图表明，在760K以上，CrO{sub3}Osub8}、Cr{sub2}O{sub5}、CrO{sub2}O{sub3}逐渐失氧，最后是Cr{sub2}O{sub3}。X射线光电子能谱表明，CrO{sub2}含量较低，Cr2p{sub3/2}光电子的结合能为579.3 eV。结果表明，二氧化铬与Crsub2}Osub3}和Crsub2}Osub5}稳定共存。磁测量显示样品的磁滞回线移动，表明铁磁CrO{sub2}中的反铁磁性Cr{sub2}O{sub3}/Cr{sub2}O{sub5}产生了交换偏置。含CrO{sub2}的氧化铬颗粒在5K时的交换偏置为9mT，矫顽力为26.3mT。
We report on the synthesis, structure and magnetic properties of a novel exchange bias system with Cr{sub 2}O{sub 3}/CrO{sub 2}/Cr{sub 2}O{sub 5} interfaces. Chromium oxide particles with mixed chromium valences were prepared by sintering CrO{sub 3} in air. X-ray diffraction patterns show that CrO{sub 3} lost its oxygen gradually with increasing temperature and time through Cr{sub 3}O{sub 8}, Cr{sub 2}O{sub 5}, CrO{sub 2}, and finally Cr{sub 2}O{sub 3} at temperatures above 760 K. X-ray photoelectron spectra indicate a low CrO{sub 2} content and a binding energy of 579.3 eV for Cr 2p{sub 3/2} photoelectrons in Cr{sub 2}O{sub 5}. Chromium dioxide was found to stably coexist with Cr{sub 2}O{sub 3} and Cr{sub 2}O{sub 5} in the particles. Magnetic measurements show hysteresis loop shifts in the sample, indicating an exchange bias induced by antiferromagnetic Cr{sub 2}O{sub 3}/Cr{sub 2}O{sub 5} in ferromagnetic CrO{sub 2}. An exchange bias of 9 mT at 5 K and a coercivity of 26.3 mT were observed in the chromium oxide particles containing CrO{sub 2}.
登录
查看更多内容
高温高压下形状控制合成高纯 CrO2
影响因子：
3
作者：
Zhao, Qiang;Fan, Yinbo;Wen, Gehui;Liu, Zhigang;Ma, Hongan;Jia, Xiaopeng;Zou, Guangtian;Mao, Ho-Kwang
通讯作者：
Mao, Ho-Kwang
影响因子：
8.6
作者：
K. Nakamura;Y. Katō;T. Akiyama;T. Ito;A. Freeman
通讯作者：
K. Nakamura;Y. Katō;T. Akiyama;T. Ito;A. Freeman
影响因子：
3.3
作者：
IKEMOTO, I;ISHII, K;THOMAS, JM
通讯作者：
THOMAS, JM
影响因子：
2.3
作者：
S. Biswas;S. Ram
通讯作者：
S. Biswas;S. Ram
影响因子：
7.3
作者：
R. Merryfield;M. Mcdaniel;G. Parks
通讯作者：
R. Merryfield;M. Mcdaniel;G. Parks