检索结果-南通市图书馆

Chinese Physics B 2018年第11期27卷 55-70页

作者： Jinbo Yang Wenyun Yang Zhuyin Shao Dong Liang Hui Zhao Yuanhua Xia Yunbo Yang State Key Laboratory for Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China Beijing Key Laboratory for Magnetoelectric materials and Devices Beijing 100871China Institutes of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621999China

Mn-based intermetallic compounds have attracted much attention due to their fascinating structural and physical properties,especially their interesting hard magnetic *** this paper,we have summarized the magnetic and structural properties of Mn-based intermetallic compounds(Mn X,where X=Al,Bi,and Ga).Various methods for synthesizing single phases of MnAl,MnBi,and Mnx Ga were developed in our lab.A very high saturation magnetization of 125 emu/g,coercivity of 5 kOe,and maximum energy product(BH)_(max)of 3.1 MG·Oe were achieved at room temperature for the pureτ-Mn–Al magnetic phase without carbon doping and the extrusion *** temperature phase(LTP)MnBi with a purity above 95 wt.%can be *** abnormal temperature coefficient of the coercivity was observed for the LTP MnBi *** coercivity increased with temperature from 100 K to 540 K,reached a maximum of 2.5 T at about540 K,and then decreased slowly to 1.8 T at 610 *** positive temperature coefficient of the coercivity is related to the evolution of the structure and magnetocrystalline anisotropy field of the LTP MnBi phase with *** LTP MnBi bonded magnets show maximum energy products(BH)_(max)of 8.9 MG·Oe(70 kJ/m^(3))and 5.0 MG·Oe(40 k J/m^(3))at room temperature and 400 K,*** Mn_(x)Ga phases with L10 structures(x〈2.0)and D0_(22)structures(x〉2.0)were *** of the above structures can be described by a D0_(22)supercell model in which 2 a-Ga and 2 b-Mn are simultaneously *** tetragonal D0_(22)phases of the Mn_(x)Ga show high coercivities ranging from 7.2 kOe for low Mn content x=1.8 to 18.2 kOe for high Mn content x=3 at room *** Mn_(1.2)Ga sample exhibits a room temperature magnetization value of 80 emu/*** hard magnetic properties of coercivityiH_(c)=3.5 kOe,remanence M_(r)=43.6 emu/g,and(BH)_(max)=2.5 MG·Oe were obtained at room *** on the above studies,we believe that Mn-based magnetic materials could

关键词： permanent magnetic materials magnetic properties manganese alloys magnetic structure coercivity magnetization neutron diffraction

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

STRUCTURE AND MAGNETISM OF RTiFe_(11) COMPOUNDS (R=Nd,Sm,Gd,Tb,Dy,Ho,Er and Y)

引用

Science China Mathematics 1989年第11期32卷 1398-1408页

作者：杨应昌孙弘孔鳞书查元勃裴谐弟 Department of Physics Peking University Beijing 100871 PRC Department of Physics Beijing University of Science and Technology Beijing 100083 PRC

The crystallographic structure and intrinsic magnetic properties have been investigated in the RTiFe_(11) compounds, where Rrepresents Nd, Sin, Gd, Tb, Dy, Ho, Er and Y. The magnetic structure and the exchange interaction between various magnetic ions in RT Fe_(11) have been analysed. It is found that the intensity of R-Fe exchange interaction is proportional to((?)—1)~2J(J—1) for the heavy-rare-earth ions. while for the light rare earth, the effect caused by 5d-4f electron exchange interaction varying with rare-earth atoms must be taken into account. In RTiFe_(11) compounds the interatomic distance dependence on the exchange interaction between Fe-Fe atoms has been observed, and the result of enhancing the Curie temperature has been obtained. The Fe atomic magnetic moment in RTiFe_(11) is discussed in terms of the band theory, and the approach has been investigated on enhancement of saturation magnetization by means of substitution of atoms. RTiFe_(11) compoumds reveal a variety of magnetocrystalline anisotropy behaviors. For Fe sublattice the easy magnetization direction and the variation of the anisotropy constants with temperature have been measured with X-ray and magnetic techniques. On the basis of the crystalline field theory, by using a single-ion model, the anisotropy conatants and their temperature dependence of the R ions have been calculated, which helps explain the spin reorientations observed in RTiFe_(11).

关键词： RTiFe_(11) compounds permanent magnetic materials intrinsic magnetic properties.

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：