河北民族师范学院学报
河北民族師範學院學報
하북민족사범학원학보
Journal of Hebei Normal University for Natinalities
2015年
2期
1~6
,共null页
韩伟 杨淑敏 李海涛 岂云开 顾建军
韓偉 楊淑敏 李海濤 豈雲開 顧建軍
한위 양숙민 리해도 기운개 고건군
稀磁半导体 (La,A)(Zn,Mn)SbO(A=Ca,Sr,Ba) 自旋电荷分别调控
稀磁半導體 (La,A)(Zn,Mn)SbO(A=Ca,Sr,Ba) 自鏇電荷分彆調控
희자반도체 (La,A)(Zn,Mn)SbO(A=Ca,Sr,Ba) 자선전하분별조공
diluted magnetic semiconductor; (La,A)(Zn,Mn)SbO (A=Ca,Sr,Ba); decoupled charge and spin doping
通过LaZnSbO在La3+的位置用A=Ca^2+,Sr^2+,Ba^2+进行变价替换引入P型载流子,使用Mn^2+替换Zn^2+引入自旋,可使ZrCuSiAs结构单相(La,A)(Zn,Mn)SbO(A=Ca,Sr,Ba)同时兼具半导体和铁磁性能,居里温度可达到40K。居里温度以下呈现类似玻璃磁性的磁性特征,(La0.95Ca0.05)(Zn0.9Mn0.1)SbO的翻转时间(τ*)和动态临界指数(zγ)分别为:τ*=2.64×10^-7s,zγ=1.91。
通過LaZnSbO在La3+的位置用A=Ca^2+,Sr^2+,Ba^2+進行變價替換引入P型載流子,使用Mn^2+替換Zn^2+引入自鏇,可使ZrCuSiAs結構單相(La,A)(Zn,Mn)SbO(A=Ca,Sr,Ba)同時兼具半導體和鐵磁性能,居裏溫度可達到40K。居裏溫度以下呈現類似玻璃磁性的磁性特徵,(La0.95Ca0.05)(Zn0.9Mn0.1)SbO的翻轉時間(τ*)和動態臨界指數(zγ)分彆為:τ*=2.64×10^-7s,zγ=1.91。
통과LaZnSbO재La3+적위치용A=Ca^2+,Sr^2+,Ba^2+진행변개체환인입P형재류자,사용Mn^2+체환Zn^2+인입자선,가사ZrCuSiAs결구단상(La,A)(Zn,Mn)SbO(A=Ca,Sr,Ba)동시겸구반도체화철자성능,거리온도가체도40K。거리온도이하정현유사파리자성적자성특정,(La0.95Ca0.05)(Zn0.9Mn0.1)SbO적번전시간(τ*)화동태림계지수(zγ)분별위:τ*=2.64×10^-7s,zγ=1.91。
This thesis shows the process in which charge is induced by substitution of A=Ca^2+, Sr^2+, Ba^2+for La^3+, while spin is induced by partial substitution of Mn^2+for Zn2+within the parent compound LaZnSbO. The re-sults indicate that the single phase ZrCuSiAs-type tetragonal crystal structure is preserved in (La,A)(Zn,Mn)SbO (A=Ca,Sr,Ba). The system remains semiconducting, doping with A and Mn results in ferromagnetic order with Tc 40 K. A spin-glass like state is found in (La0.95Ca0.05)(Zn0.9Mn0.1)SbO below Cure temperature which flipping time and dynamical critical are 2.64×10^-7s and 1.91 respectively.