检索结果-南通市图书馆

Structure and Magnetic Properties of ZnO:Cr Prepared by CrIonIm plantation into ZnO Crystals

Wuhan University Journal of Natural Sciences 2013年第4期18卷 283-288页

作者： LIN Baozhu WANG Lingling Yuldashev Sh U FU Dejun KANG T W Key Laboratory of Artificial Micro-and Nano-Materials of Ministry of Education/School of Physics and Technology Wuhan University Quantum-Functional Semiconductor Research Center Dongguk University

ZnO：Cr layer was prepared by Cr ion implantation into ZnO bulk crystals. The structural, optical, and magnetic properties of the ZnO：Cr layer were studied with X-ray diffraction, photoluminescence, and superconductor quantum interferometer, respectively. The ZnO：Cr layer implanted Cr with a dose of 5 10 16 cm 2 remained wurtzite structure and exhibited near-band-edge photoluminescence at 3.365 eV with full-width at half-maximum of 8.4 meV at 10 K. The magnetic measurement showed that the ferromagnetism changed at room temperature by different Cr concentration. For samples implanted to high doses, remanent magnetization reached 1.805 10 -4 emu/g and coercive field was 244.5 Oe. Hall effect measurement showed a decrease of the resistivity from 251.7 cmto 28.6 cmafter annealing at 800 ℃. The magnetism is interpreted by bound magnetic polarons, which were taken into account of the process that electrons were locally trapped by oxygen vacancies and occupied the orbitals that overlapped with d shell of neighboring Cr ions.

关键词： ion implantation ZnO chromium ferromagnetic property

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Substrate temperature dependence of chemical state and magnetoresistance characteristics of Co–TiO2 nanocomposite films

引用

Transactions of Nonferrous Metals Society of China 2020年第9期30卷 2502-2509页

作者： Hao-yu CHEN Yi-wen ZHANG Zhong WU Zhen-bo QIN Shan-shan WU Wen-bin HU Key Laboratory for Advanced Ceramics and Machining Technology Ministry of EducationTianjin UniversityTianjin 300072China School of Materials Science and Engineering Tianjin UniversityTianjin 300072China

Co−TiO2 nanocomposite films were prepared via magnetron sputtering at various substrate *** films comprise Co particles dispersed in an amorphous TiO2 matrix and exhibit coexisting ferromagnetic and superparamagnetic *** the substrate temperature increases from room temperature to 400℃,Co particles gradually grow,and the degree of Co oxidation significantly ***,the saturation magnetization increases from 0.13 to 0.43 T at the same Co content by increasing the substrate temperature from room temperature to 400℃.At a high substrate temperature,conductive pathways form among some of the clustered Co ***,resistivity rapidly declines from 1600 to 76μΩ·*** magnetoresistive characteristic of Co−TiO2 films is achieved even at resistivity of as low as 76μΩ·*** results reveal that the obtained nanocomposite films have low Co oxidation,high magnetization and magnetoresistance at room temperature.

关键词： Co TiO2 nanocomposite films ferromagnetic property superparamagnetic property magnetoresistance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：