ESR STUDY ON NANOCRYSTALLINE AND AMORPHOUS CR2O3

被引：16

作者：

HOU, B

JI, X

XIE, Y

LI, J

SHEN, B

QIAN, Y

机构：

[1] UNIV SCI & TECHNOL CHINA,STRUCT RES LAB,HEFEI 230026,PEOPLES R CHINA

[2] UNIV SCI & TECHNOL CHINA,DEPT MODERN PHYS,HEFEI 230026,PEOPLES R CHINA

[3] CHINESE ACAD SCI,INST PHYS,STATE KEY LAB MAGNETISM,BEIJING 100080,PEOPLES R CHINA

来源：

NANOSTRUCTURED MATERIALS | 1995年 / 5卷 / 05期

关键词：

D O I：

10.1016/0965-9773(95)00270-O

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Amorphous Cr2O3 was prepared by thermal decomposition of a salt precursor. When sintering temperature was over 300 degrees C the amorphous phase crystallized out nanocrystalline Cr2O3. An impurity phase, ferromagnetic CrO2 (not more than 1 percent), was detected from its magnetic hysteresis loop and TEM studies. Amorphous and nanocrystalline Cr2O3 with different grain sizes were investigated by ESR in the temperature range between 1OOK-400K. The dependence of ESR spectra on temperature shows the character of the antiferromagnetic phase transformation. For nanocrystalline (25-60 nm), the Lande factor g value is larger and the Neel temperature T-n is higher than that of amorphous and polycrystalline, suggesting strengthening of antiferromagnetic coupling.

引用

页码：599 / 605

页数：7

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