Spin-glasslike behavior of K+-containing α-MnO2 nanotubes

被引：32

作者：

Luo, J. ^{[1
]}

Zhu, H. T. ^{[1
,2
]}

Zhang, F. ^{[1
,2
]}

Liang, J. K. ^{[1
,3
]}

Rao, G. H. ^{[1
]}

Li, J. B. ^{[1
]}

Du, Z. M. ^{[2
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Univ Sci & Technol Beijing, Dept Mat Sci & Engn, Beijing 100083, Peoples R China

[3] Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2009年 / 105卷 / 09期

基金：

中国国家自然科学基金;

关键词：

OCTAHEDRAL MOLECULAR-SIEVES; MANGANESE OXIDE; MAGNETIC-PROPERTIES; REMANENT MAGNETIZATION; HYDROTHERMAL SYNTHESIS; LITHIUM BATTERIES; GLASSES; NANOWIRES; GROWTH; TIME;

D O I：

10.1063/1.3117495

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Magnetic properties of K+-containing alpha-MnO2 nanotubes have been systematically investigated by dc magnetic measurements. Zero-field-cooled and field- cooled susceptibilities display divergences at low temperature, and a spin-glass temperature of 33.1 K is determined from the de Almedia-Thouless line by extrapolating the applied field to zero. The dc magnetic measurements, such as the field dependent magnetic susceptibility, hysteresis effect, thermoremanent magnetization, and memory effect, further confirm the spin-glass feature of the tetragonal alpha-MnO2 sample, which can be attributed to the geometrical frustration on the triangular lattices and the mixed valence of Mn3+ and Mn4+. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3117495]

引用

页数：5