7/22/2019 turov

1/34

983 . 140, . 3

534+ 538.114

. . , . .

1. 429 ) (429). ) . (432).2. 436 ) (436). ) (438). ) (444).3. 448 ) (448). ) (449). ) . (454).4. 458 460

1. )

25 (19561958 .) 1 3 , ( ) . ( ) , ( ., , 4 ' 5 ) . ( ) , , ( ) . , ( ) . , . 19631965 . 6 1 1 . 7> 8 , 6 ' 1 0 12~ 22 . ( ) ( a F e2 O 3) ,

7/22/2019 turov

2/34

4 30 . . , . .

, ( ) , . 6~ 9 , , ( ) . ( ) , . , , , , , ; ( ). , . , , = 0 ( * 0 ) , , = . , , , . 6> 1 0 . , . 1 0 , , . , , . 1 0 , (D y ) , > ~~ 10 6 ( ). 1 3> 1 4 . , ( ) ( , ) ^ = 0: 0 = | = 0 , 0 , , 1 3> 1 4 , coh = ( ) >0. ; . ( 0) , (frozen or free la t t ice model; . , , l 2 ~ 2 1 ) . 22~ 24. *) ,

*) , , (frozenlattice) , (free lattice).

7/22/2019 turov

3/34

431

, , . , . ( ) . , , . ( 6 "9 , . 2 5 " 3 3 ) , ( )F e B O 3 2 7, 3 1 , 3 4, 3 5, 3 6, 3 7 , ( , , VFeO3)( . 38~ 42) ( M n F 2 2 3) 4 3 5 0 . 2 3 (C o0 i2 5 M n 0 i7 5 F e 2O 4 ) , ( ) . , ( , ) : ( = 0) ( ) . . , , ( ). ( I ( ) ( )) .1 , (1.1) = 0, . . , . , >1 ( ) ( > . . , ). (1.1), , ( . 2527,34,3941 = 0 4 2.

. 1. . .

7/22/2019 turov

4/34

432 . . , . .

) . , , , , , , . , , ( . 5 1 ) . , ( u i 7 ) , ( )

5 2. , . , , . , ( ) , (1964 .) . 53, ( ., , 5 4 ) . , , , , , ( 64, . * 5 6> 6 6) . , , , ( , ) ^ ( )(\ i= 0, 1, 2, 3), ( ) == 1+ 1 > , . , ( ). (0 | | 0) = = + * 2 ' , ( 10> ) ( , 2) , , , 1 0 2 0 , ; ( > 20) B ( ^ ^ ) . .

, , 0 , , = 0 ++ ' ( (0 | ' | 0> 0). ' , , | 0 | ZA^ . , , ^ , , , ,

7/22/2019 turov

5/34

4 3 3

, . . ( ) 1

, u\f, = + ; , = uip + Au(j.

, Uij ( utj), ( (2 . 1 ) ) . , , , ( . . ) . ( V ) 2 , ( ) oofe ~ 2. ( ) ( 0 ) ( ) 2 , ( ) . . | 0 |2 \ , .

, 1964 . , 0 . > 0 , ( ) , , , . . , ( ) , , , *) . % ( ) ( *) , , , , . ( ) , , . , , , , ( , ) .

7/22/2019 turov

6/34

4 3 4 . . , . .

. 1). , > , 57, 58>59. ( ), ( ) ( . 2). , , GHC , ( , u\j) ,

. 2. . .

( ), ( ) . . , ( ) . , . (1.1). . G H G . ( ) , ( ) . , ( Autj) . > = co|i . cojj . . , ,

= - ^ . (1-2) , ,

7/22/2019 turov

7/34

435 ( ) . , , , ( ). , , : , , , . (1.1) ( ), = 0 , , = 1. , , C H G ,

. 3. >0 == 4 0 ( ) , ( )AM , . . ( 0) . , , , . , , ( , , ) , , . ( , , .) .

( . . 2): , , , , ( ) , , . , , 6 , . 140, . 3

7/22/2019 turov

8/34

4 3 6 . . , . .

( 0, , , ( . 3) . , .

2. )

, ( . , , 0, . 774780): ( ) = BammiTrijUni. (2 .1)

( , , ijnl : , , z.) ijni ; m = ( ) / 0 ( ) , : 2 () = Ml, 2 = 1; ,( ) . , ( ).

d iv ( + 4 ) = 0 , ro t = 0 . (2.3) ,

C u u (2 . 4) ijni ( ) .

*) , . , .

7/22/2019 turov

9/34

4 3 7

, , . ( )J ( r ) d r (dr= dxdydz), (2.5)

() = + + , (2.6) ( m = m == u[f, ) ,

Am= m m() huij = uij u\f'1 (2.7) . ( , , utj ), , / = 0 utj (2.1) (2.4), (60, .778, 2, . 57), (2.6) (2.2). , K[fnu ( ). , ( ) , . *).

, . m (6/6 , 6 = 1 0 i = } i ]'). (2.7) (m ,ujj}), . , , .

, , , . , . *) , , 2.

6*

7/22/2019 turov

10/34

4 3 8 . . , . .

: (2.8) 64: J I M M ] (2.10)

( ) , (2.9) 5

a'ijr\ ijniun t . ( r\ijni , Cijnl.) )

, , , [001] ||Z . ( ) (2.1)(2 .4) , , , , (2.1) (2.4) [ . , , , , , : = 1 , == 2, zz= 3,yz = zyE = 4>

zx= xz== 5, xy= == 6.( , = ^ = ^ *'' ^ ~ ~ = .) , ,

2)_ &) _ 1 (2)_ ~(2)_ (2)_ 1: 13= 3 1 = 4 4 = 5 5 = 6 ^ " g "(2.13)

. , %(2.5) (2.2) (2.4 ) \ = = c o n st ,

m (2.1)(2.6) , : = con st+ *( &4+ ocgal+ c&d) ,

7/22/2019 turov

11/34

439

, : ^ *, * , ( ). . , * , * , : *> 0 , * < 0 .

AM Auij || || Z, , (2.14), ( 11 12)( 11+2 12

,,(0) ( ) / 12 1 < )Uyy= UXX =i / t ( c 1 1 C 1 2 ) ( C = , ( . . k ||cc ||Z ) , (2.8), (2.9)

(wh + )m+(k)+ ikyjjf ( )= 0,tk B ( 2 7 >^ ( ) + [ 2 ( )] ( ) = 0,

[ ( ) ] ( ) = 0; (2.18) co ft= ^ [2 +2 ,(Ut U)+ *) + (2.19)

(2.16) ( . . );

;

. (2.18) , ; =S | / c , (2.17) : ( iuy = imy = 0) , + ) ? 2) >0 ?= 0; 2.20) ( + = + imy = 0)

(co fcco)(co? co2) c;cuocof=O. (2.21) (2.20) (2.21)

7/22/2019 turov

12/34

4 4 0 . . , . .

= ( ) (2.20) (2.21) ( ==0). \ 0 , , . , ( ) (2.16),

: v *(2.15). : | | | | [001] ( , , ). \ (2.23) *) . , 0 (2.23) (2.15) : 2 2 4 )

= 0 | | [001] , *=0 + . = Js . (2.25)

, * : 0 | |[001] | | [111]. 1 ^ . 2.26) / 4 1

, , . , . ( ) * (2.15), ( ), * + 1/2 . , \ ( ) , *. = 0 0 (2.23) B\l%Ck * (2.15).

*) , : * + B J / ( C U ] 2 ) , . . : || [001] , || [111] , || [110] , . . 0 , , .

7/22/2019 turov

13/34

441

,

2 * 0 . (2.27) (2.26). , (2.20) (2.21) 0. , .

* 0 ) || [001] . 4.

. ) & 1); ) (= 1). (J) ( ) , ( ) . (I) (II, III). , , (2.21). ( ), , , ( ). Z,

7/22/2019 turov

14/34

4 4 2 . . , . .

:c o * ( O i i i

, coj * , (2.62,)

. 2.33) (2.33) ( , ) , , :

4 ( 1 - ) . (2-34) , (2.22) (2.23), Z, , . , - -1 . (2.34 ) , (2.21) = 1 ( ), = {akf J (2.36)

( ) 2 ( ) . (2.37)

, : ( 2 ), 2 ( .4 , ). , , , *0 coi = . , : , (2.35 ) ( ), (2.36) ( )

, , , , (2.17) . (

7/22/2019 turov

15/34

4 4 3

*

iku_= pm_; (2.38)

C0 0 4 4

2 . 3 9 ) (2.38) _ , , , , . >0 _ ., . . (2.39) ( ) ? > 1 CkJB2. (2.39) (2.14 ), , : ( , ) , . : 6 3 , , , ( 2.2) . ,

(2.4) (2.1) , . Autj AM

7/22/2019 turov

16/34

4 4 4 . . , . .

, , , . , ( ' (2.40)). ,

= 0, 1 = 2 1 = 2 4 4 . (2.42) , : ( = 0), ( , ). , , ( (2.10) (2.11) ). , .

) ( ) , , G H G , , , ( , ) ,

, ( ). ( ) , 87 219 . = 0 , > 6 . , , , ( ), , ( ., ,67> 1 2 > 2 0 ' 2 l ) . (AZ/Z~ BIC ~ 10~310~2) Kf 6 8 / 3, .

' D y , , ( = 4,2 if(3) 106107 / 3). , . 1^, , (2.1), . . , . Z, , X [100] [010] , , (2.6)

7/22/2019 turov

17/34

445

, ( (2.12) ): = 52 2 , 21 = 12, 33, 54 4 = 5, 6, = , = = / 12, = 2 2, 33, 12 = 21,1 = 2 3 == 31 = 3 2 , 44 = 55 , 6. ( , (2.13), .)

, , , [100], || || X. ujj" AM ^ , . X ( . . ) .

( 2 2) [ 02 _ 2 ) ( ( 0 2 _ ( 2_ 2 2 ) _ ^ ^ 2_ ,2 __U U c o K c o j y = 0; 2.43)

2 .44) ( , , ),

. 2.45)

, . . (2.44) ], , 4 : 2.46)2.47)

0

4= 7 v^ = (2 4 8) (2.46) (2.47) ( ) K Q, , . , , :

) 1 , (2.49)1 (250)

7/22/2019 turov

18/34

4 4 6 . . , . .

(2.43) . , g (2.51)

| | ) , 2.53)~ 2.54)

2.55) , (

) , (2.46) > 0 . (2.56)

^" 4 > , 4 0 ( ) , H Q < 0 . , , * 1 = 0. . , || X, < ;0( ), = | |. -> 1 ( , ) . , ( ) , D y , , , ( (2.52) (2.5 5 )) . , . . = | |, :

0)1 +

HI V m (a*)2 (259)

7/22/2019 turov

19/34

4 4 7

; | | + 4 ) (2.60)

, = / 0 2 = Y # A . ( , ) || . , , (2.3), ( ) . ( . . (2.5 1)) ,

7/22/2019 turov

20/34

4 48 . . , . .

( ). (2.8) (2.9) (2.10) (2.11), , , (2.54), . = +iT:

2 .= 2 1 , = 1/ . (2.51)

( . . 6-> 1 (2.67) (2.59) , , cujmm> = , 1 ^ (2.68)

< 1 , (2.68) , ( ) . (2.59) . , . , (Dy ). , 1 7> 1 8 ( 10 1). , (2.60), ( = | |) ( ~ 106 104 ). 20, (2.54) . 6 ( (2.64)) 50%. ( .) *)

3. )

1 M t 2 . . .1 = 2 0 ( >

*) :~ y

7/22/2019 turov

21/34

4 4 9

2 : M j = \= \ , 2 + I2= 1, ml = 0. (3.3)

( ) = , 1 | 1 | = 1, a m 0. = 1 + 2, : 2 ( , ) , , 2 1.2) (2.2) ; , (2 .2) .3) 2? * (3.5)

, , ( ) m = 0 I= 1 ( > 0).4 ) ( 1 m=/=0, (3.4 )) 3.6)

d 6 8> 6 2 . ( 1< 0 ) , ( 0 ) , 4;') , (2.9) (2.8) ( = 1, 2) .

GHC E r F e O 3 4 2. . , , GHG, 9 , 3 8 *1 .

7/22/2019 turov

22/34

450 . . , . . ( , . 449) : ; , 131 , [\ ', = ^ " ; , 12, 13, 21, , , S4 4 , B5i ; 1, 1 2 , 13 2 1 , 2 2 , 2 3 , 6\ 4,5 , 6 2

d31mzlx, 3.7) . E r F e O 3 T m F eO 3 ,

& ,

4,0

2,0

. 5. ( k || Z) . ) . ( * > 2\); ) ( 2

7/22/2019 turov

23/34

4 5 1

: = ? +2 2 +d3l(d3i di3) + **, (3.8)

= % 2/rj f (d31 diZ)t L+ % . ( : ) (3.8) (3.9), , \ 4 . , . 5, , , > 0. , , :1) ( ^ ) 0 = / 2 m == d13'A0 ( )

7/22/2019 turov

24/34

452 . . , . .

, ( G H G ) . (3.13) >1 ( = 0)= ( , 1 1+ 5 ), (3 14)

, , . (= 0) = 0, . \ (3.14) . 5, , . , Ki = 0, 0 = 0 ( > 0) ( 1. k || Z ( < 1 , . . 5), 0 = / 2, . .m l k . (3.13), , :

col=2 [AM'W iKi +2 ) + + 5] , (3.19) = 8nM0d\3/Al , . , Kj + 2 = 0, 5= / ++ )< 1 ( 2, 5 = ) sa , , , 2. 3 9^ 4 1 ( .6) .

7/22/2019 turov

25/34

453 , 39~ 41 (^1%), . 0 < 6 ^ / 2, 0), 42 . , , . 3 . 6. 4 2 = (3.18) 5- 1 ( * 2) , <

2 ? ) , (3 .20)(3 .21)

( 6

J J ) , ErFeO, k || Z. ( ) , ( < , ) = 5). , (3.21) / 0, , , 1 , , . sa

7/22/2019 turov

26/34

454 . . , . . . , ( . . )). , ( ) , 70, , . , 70, , . .

) . , , ( a F e2O a) ( F e B O 3) . 20% 2 5 2 8 . , 5 ' 2 8 2 9> 30 ( , ) . X, ,

. 7. , . == M i + M 2, a ij) == 2 cos1|>. . Kl

1}, , ( . 450), = 2 2 = ^ia + 2 , 13 = 23,

44 = ^55i = ^22 = ^12 " 2 6 , 1 = 2 3 , t44 = C 5 5 . , , (3.6) d (lxmy lymx). ( 2 X, Y), > 0. 2 2 ( . 7). , (3.1) (3.3), = ( + 2)/2 , ty= ( 2)/2 : m2 = cos2i|). , X ( ) = . > 0

7/22/2019 turov

27/34

455

(2.6) .

, , :1. , ^ ,

3.23)

m || X ( = 0). AJ)= ( /2) |) == ( f Hd)/HE , , = ( + Hd)/HE.2. > 0, > , = 3.24)

, = ; m m || X m || Y ( ~ % ^ > H Hd/ H E) . < 0 ( ) 1. , > 0 . , : = 0 , (3.24), m || Y,

/ _ + (3.25) = / 2 = 0, ( X, Y, ) ^ * 1 m || .

, : || || X. , ( ), :1.

2. ~ = 2 ( 2 + ) . 3.26)

6

{ )+ sin* ],(3.27)

0

7/22/2019 turov

28/34

456 . . , . . , , . 1 ( > 0) 0, , 1 ( . 8, ) 2, (3.23). ( 2) , (3.27), , , m || (3.24) . , = (3.23), :

= = (3.28) , , . . 8, , 0 ( ) (3.28)

t r

6 6

* * a) S ) . 8. > 0 ( ) || ( ) ( ).1 = 0, 2 > 0, II < 0, J. , 3 > 0, < 0, .

= * (3.25). 1 , = 0( * = 0), 2 . : % ) , 0/ si :>i = col + ?6ftft>| ;

= stk , ; = stk .*) , , , tub | fe 0, (3.27), , , . 0 = 0.

7/22/2019 turov

29/34

45 7 , , .

si= P"1 ( U ^ e e sin 22q>), s\= p~iCm (1 cos2 2cp), 6 (3.29)

= 0 1 ( ^ ) {3.24) 2 ( ^ 1> ) . , (3.26) (3.27). ( > 0)

. 9 3 0. 25~ 28 = 0 a Fe2O3 FeBO3 s(H ) .

( = = *) , t,s > 1 st ( >0) , ; ( ) (3.18) * 55 > . (3.20) (3.21) , .

, , ( . ) . 2). , ( ) , = / . , , (3.18) ( 5> 6) (2.59) > . , , , , , ( ) . , , ^ 0 m || ||( 1). (2.61) (2.64), ,

. 9. (1) ( ) (2) L _LZ || || X, > 0, 1 .

col= 6 + * +8 0 ( +Hdf 2 sin2 3.30)4fe = 0 ( ) (3.28). G H C .

7/22/2019 turov

30/34

4 5 8 . . , . .

, , . 6, (2.50) (3.29) ( ) 6= # 6 ( # + # # 6 ) 1 , (3.31)

( ) ?6= ^ 6 ( ^ 2 + 6 ) 1 (3.32)( = Hd = 0). , ( + = 0 = 0), , 6= 1. # ( ^ 1 ) , < ^1 ( CHG ). , = 1 , 6 1 , , , ( ) . ( 106 ) , 6 1/2, 103 . , G H G , ( Dy ) .

4. ( ) , ( ) . , . , , : , , , ( ,

, ). , ( , , ). , . ( , ) , , , ( , ). , . . , ( , ). 32 > 3 3 , (

7/22/2019 turov

31/34

459

) , : = 3+ 3. ( 3) ( 3) . , 7 1 7 3, / 3 102104. (ujj ~ 10~6) , , , . . 3 3. ( G H C . 7476 \

, , , . ( ) , . , . ( ) , , , ( ), ( ) . ( ) . ( ) . ( ) , 58,59,7779

, . L, , , ,

7/22/2019 turov

32/34

4 60 . . , . .

(4.1) , L ( ) . (4.1) . , . , , , . , , ( ., , 8 0 . 6 9 ) . , , , 81. , , , 81. , , ( , ., , 8 2) . . . , . . , . . , . . , . . , . . , . . . . .

, ,

1. . ., . . , 1956, . 3, . 15.2. . ., . . , . . ,1958, . 35, . 228.3. i 11 e 1 Phys. Rev., 1958, v. 110, p. 836.4. . . / . . . .: ,1970. . IV, . . . 5.5. . . . / . . . . . : , 1974.6. . , . . , 1964, . 47, . 2095.7. . I n : Physics and Techniques of Low Temperatures: P r o c . of 3rd Regional Conference. Prague, 1963. P. 86.8. T a s a k i A., I i d a S. J. Phys. Soc. Japan, 1963, v. 18. p. 1148.9. I i d a S., T a s a k i A. Pr oc. of I n te rn . Conference on Ma gnetism. N ott ingham ,1964. P . 583.10. T . ., . . , 1965, . 7, . 217. . M i z u s h i m a ., I i d a S. J. Ph ys. Soc. Jap an , 1966, v. 21, p . 1521.12. p e r B. R. Phys. Rev., 1968, v. 169, p. 281.C o o p e r B. R. I n : Magnetic Pro perties of Rare Eart h Metals/Ed, by R. J. Ell iott . Lnd.; N.Y.: Plenum Press, 1972.1 3 . N i e l s e n M., B i e r r u m M e l l e r H ., L i n d g a r d P . A., M a c k i n t o s h A. R.Phys. Rev. Lett., 1970, v. 25, p. 1451.14. N i e l s e n M., B i e r r u m M01 1 e r H ., M a c k i n t o s h A. R. J . Appl.Phys., 1970, v. 41, p. 1174.15. J e n s e n J. In tern . J. Magn., 1971, v. 1, p. 271.16. V i g r e n D . ., L i u S. H . Ph ys. Rev. Let t. , 1971, v. 27, p. 674; Phys. Rev.Ser. B, 1972, v. 5, p. 217.17. H a r t L. W., S t a n f r d J. L. Ph ys. Rev. Let t. , 1971, v. 27, p. 676.18. W a g n e r T . K., S t a n f o r d J . L . Phys. Rev. Ser. B, 1972, v. 5, p. 1876.

7/22/2019 turov

33/34

4 6 1

1 9 . L i u S. . I n t e r n . J . M a g n . , 1972, v. 3, p. 327.2 0 . C h o w H . , K e f f e r F . P h y s . Rev. Ser. B, 1973, v. 7, p. 2 0 2 8 .2 1 . H o u m a n n J . G. , J e n s e n J . , T o u b o r y P . I b i d . , 1975, v. 12, p. 332.22 . J e n s e n J ., P a 1m e S. . J . P h y s . Ser. C,1979,v. 12, p. 4 5 7 3 .2 3 . L e e E. W., a l e R. W. Ibid ., p. 1131.24. M i n t s h A. R. J. M agn. an d Magn. M ater., 1980, v. 1518, p. 326.25. z h g i n V. I. , M a k s i m e n k o v P . P . I n : D igests of IN TER MAG Conference. Kyoto , 1972.49 4; IEEE Trans. Magn., 1972, v. Mag 8, p. 645.26. . . , 1972, . 14, . 2180.27. S e a v e y . . So l. State C o m m . , 1972, v. 10, p. 219.28. . ., . . , 1973, . 65, . 657.29. . ., . ., . . , 1974, . 16, . 2192.30. . ., . ., . . , 1974, . 67, . 816.3 1 . . ., . , . ., . . , 1974, . 66, . 1847.32. . . , . . ,1977, . 73, . 998;I n : P r o c . I C M ' 7 6 . Amsterdam, N orth Holland, 1977. P t. I I , p. 979.33 . . . . . . ., 1978, . 42, . 1625.34. J a n t z W., W e t 11 i n g W. Appl. Phys., 1978, v. 15, p. 399.35. P e t r a k o v s k y G . A., P a n k r a t s A. I . . 3 2 . P t . I l l , p. 1447.36. . ., . . , 1977, . 72, . 2362.37. . ., . . , 1977, . 72, . 2367.38. . ., . ., ., . ., . . , 1969, . 57, . 1124.39. G o r o d e t s k y G ., L i i t h i . Phys. Rev. Ser. , 1970, v. 2, p. 3688.40. . . , . ., . ., . ., . . , 1974, . 16, . 1426. 41. G o r o d e t s k y G ., S h a f t S., W a n k l y n . M. Phys. Rev. Ser. , 1976,

v. 14, p. 2051.42. . E., T a p . ., Ill . . , 1977, . 19, . 1107.4 3 . S h a p i a Y., Z a k Y. P hys. Re v., 1968, v. 170, p. 503.44. M e l c h e r R. L . J. Appl. Phys., 1970, v. 41, p. 1412.45. S h a p i r a Y. Phys. Rev., 1969, v. 184, p . 589.46. S h a p i r a Y. Ibid ., 1969, v. 187, p. 734.47. L i e b e r m a n R. C , B a n e r j e e S. K. J. Appl. Phys., 1970, v. 41, p. 1414.48. . . , 1975, . 17, . 430.49. . . I b id ., . 2141.50. . . I b id ., . 2712.5 1 . . ., . . . 81/ 1, , 1981. . . . . ; , 1982. . 49. 52. H i g g s . . P h ys. Lett., 1964, v. 12, p. 132.5 3 . . . , . . , 1950, . 20, . 1064.54. . . , 1978, . 125, . 169.55. . . , . . , 1977, . 123, . 505.56. . . , 1978, . 124, . 487.57. . ., . . , 1977, . 43, . 645..58. . ., . . . 7 9 / 1 , , 1979.59. v . ., 1 u t s G. G . J. Magn. and Magn. Mat er., 1980, v. 1518,p . 582.60. . . . . : , 1971.6 1 . . . , . X. , 1964, . 46, . 201.

62. . . . .: . , 1963.6 3 . . ., . ., . . .: , 1967.64. . . . .: , 1973.65. . . , . . . .: , 1965.66. . . , 1966, . 8, . 2579.67. . . , . ., .3. , . . . .: , 1965. . I .

7/22/2019 turov

34/34

462 . . , . .

68. . . , 1957, . 32, . 1547.69. . . , . . , . ., . 3 .

. .: , 1979.70. K o s h i z u k a N . , U s h i o d a S. Ph ys. R ev. Ser. B, 1980, v. 22, p. 5394.7 1 . O z b o g i n V. I ., L e b e d e v A. Yu., Y a k u b o v s k y A. Yu. I E E E

Trans. Magn., 1981, v. Mag 17, p. 2727.72. . ., . . , . .

, 1981, . 34, . 22.73. . . , . . , . . ,

. . , 1982, . 24, . 1870.74. . . , . . , 1978, . 20, . 2942.75. . ., . . , 1975, . 17, . 2247.76. . ., . ., . . ,

1979 21 . 254.77. . ., . . , 1980, . 50, . 717, 903.78. . ., . . , 1980, . 31, . 308.79. . ., . . , 1981, . 23, . 2653; 1982, . 24, . 1145.80. . . , . . , 1971, . 16, . 1114.8 1 . S a n d e r c o c k J . R ., P a l m e r S. . , 11 i 11 R. J., H a y e s W.,

S m i t h S. R. P., Y u n g A. P . J. Ph ys. Ser. C, 1972, v. 5, p . 3126.82. . , . , . . :

, 1975, . 5.