POLARIZED POSITRONS AS SPIN DETECTORS FOR PARAMAGNETIC CENTERS IN SOLIDS

被引：2
|
作者：
DECKERS, C
EHMANN, J
GREIF, H
KEUSER, F
KNICHEL, W
LAUFF, U
MAIER, K
SIEGLE, A
TONGBHOYAI, M
机构：
[1] MAX PLANCK INST MET RES,INST PHYS,D-70569 STUTTGART,GERMANY
[2] UNIV STUTTGART,INST THEORET & ANGEW PHYS,D-70569 STUTTGART,GERMANY
来源：
JOURNAL DE PHYSIQUE IV | 1995年 / 5卷 / C1期
关键词：
D O I：
10.1051/jp4:1995109
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A technique for studying paramagnetic defects in insulators or semiconductors acting as positron traps is presented. The spin polarization of the paramagnetic electrons of such centres can be determined by investigating the annihilation of spin-polarized positrons, e.g. by Doppler broadening (DB) or positron lifetime measurements. The viability of this technique is demonstrated by measuring the temperature dependence of the polarization of the paramagnetic electrons in F-centres in KCl in high magnetic fields (+/-4.5T).
引用
收藏
页码：81 / 86
页数：6
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