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6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=Ca2+, Sr2+, Ba2+进行变价替换引入P型载流子,使用Mn2+替换Zn2+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40 K。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=Ca2+, Sr2+, Ba2+進行變價替換引入P型載流子,使用Mn2+替換Zn2+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40 K。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=Ca2+, Sr2+, Ba2+진행변개체환인입P형재류자,사용Mn2+체환Zn2+인입자선,가사ZrCuSiAs결구단상(La,A)(Zn,Mn)SbO (A=Ca, Sr, Ba)동시겸구반도체화철자성능,거리온도가체도40 K。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=Ca2+, Sr2+, Ba2+for La3+, while spin is induced by partial substitution of Mn2+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.