We have studied moon spin relaxation in Si and Te at temperatures of about 250 - 300 K. The high damping rate aT the moon spin precession at the observed ...
Hyperfine Interactions 6 (1979) 175-176 @North-Holland Publishing Company
THE PARAMAGNETIC STATE (~+e-) IN SILICON AND TELLURIUM AT HIGH TEMPERATURE l.I. V.S.
G U R E V I C H , I.G. I V A N T E R , B.A. N I K O L S K Y , R O G A N O V , V.I. S E L I V A N O V , V.A. S U E T I N
l.V. K u r c h a t o v UI. K u r e h a t o v a
I n s t i t u t e of A t o m i c 46, M o s c o w , USSR
A.N.
PONOMAREV,
Energy,
ABSTRACT The p a r a m a z n e t i c s t a t e (U+e -) in Si and Te was o b s e r v e d in a l o n g i t u d i n a l m a g n e t i c {ield. The m e a n l i T e t i m e s os t h e s e s t a t e s were obtained: TSi
1.45(3)
ps,
TTe
= 12.5(8)
ps at
290
K, TTe
= 12(2)
ps
at 250
We have s t u d i e d m o o n spin r e l a x a t i o n in Si and Te at t e m p e r a t u r e s of a b o u t 250 - 300 K. The high d a m p i n g r a t e aT the m o o n spin p r e c e s s i o n at the o b s e r v e d t e m p e r a t u r e s i n d i c a t e s that it is due to m o o n i n t e r a c t i o n w i t h e l e c t r o n s . To a n a l y z e this ~ n t e r a c t i o n in m o r e d e t a i l we a p p l i e d a l o n g i t u d i n a l m a g n e t i c T i e l d H. The d e p e n d e n c e of %~e m o o n spin r e l a x a t i o n r a t e A v e r s u s H in Si and Te is s h o w n in T i g u r e I and 2.
A,
p s e c "t
Sz, T =290 K
Fi#ure
2
t
o
I
E x p e r i m e n t a l d e p e n d e n c e A(H) in Si at 290 K, The s o l i d c u r v e is d r a w n to g u i d e the eye.
- -
0
f
2
3
4
$
6
H,kOe 175
K.
176
I.I. Gurevich et al./Silicon and Tellurium at High Temperature
A, p,~c "~
290 K 250K
t. Figure T=290 K
. . . .
I
0 89
0
I
. . . .
I
~ooo
0
H, 0e
I
200
t't
}
T.250 K
. . . .
f~
. . . .
f
2.oo0
. . . .
30o0
2
Experimental dependence A[H] in Ts at 290 K and 250 K. The dependence A(H] at 2BO K for H~ o, ~o being the frequency c o r r e s p o n d i n g to the (;+e-) interaction in the paremagnet i c state. Figure 3 shows the t e m p e r a t u r e dependence of the much spin relaxation rate Ai in Te s various transverse magnetic fields Hi.
Ai
~ jtlSec
"1 h
,,
r
,
I
,
,
,
i
L
,
,
,
,
I
,
2 Figure
+ Hj.=SOOe o H.L = 120 O= 9
Experimental dependence Aj(T) in Te for the transverse magnetic field Hi9
H j = 3 0 0 Oe
" 14i=?00 0e
3
~t
o ,
r
,
,
T
400
0
r
,
,
I
,+00
.
.
.
.
~K
i
300
Re~erence /I/
I.I. Gurevich, B.A. Nikolsky, J.E.T.P. 88, 808, 1975.
V.I.
Selivanov,
B.V.
Sokolov,
