In the last two decades a revolutionary improvement has taken place in our understanding of the magnetic behavior of solids. A major contribution to this development has been made with the intense beams of neutrons now available from research reactors. Neutrons interact with magnetic systems through their magnetic moments; the energies, momenta and wavelengths of thermal neutrons correspond with those characteristic of solids. The changes in momentum and energy when a neutron is magnetically scattered in a solid therefore are readily measured, yielding information on magnetic structures and excitations that can not be obtained by other means.

1.
S. H. Chen, S. Yip, PHYSICS TODAY, April 1976, page 32.
2.
Magnetic Properties of Rare Earth Metals (R. J. Elliott, ed.), Plenum, New York (1972).
3.
M. A.
Ruderman
,
C.
Kittel
,
Phys. Rev.
96
,
99
(
1954
);
T.
Kasuya
,
Prog. Theor. Phys.
16
,
45
(
1956
);
K.
Yosida
,
Phys. Rev.
106
,
893
(
1957
).
4.
A. J. Freeman, reference 2, chapter 6;
P. A.
Lindgärd
,
B. N.
Harmon
,
A. J.
Freeman
,
Phys. Rev. Lett.
35
,
383
(
1975
).
5.
K. W. H.
Stevens
,
Proc. Phys. Soc.
A65
,
209
(
1952
).
6.
W. C. Koehler, reference 2, chapter 3.
7.
A. R.
Mackintosh
,
Phys. Rev. Lett.
9
,
90
(
1962
);
H.
Miwa
,
Prog. Theor. Phys.
29
,
477
(
1963
).
8.
W. C.
Koehler
,
H. R.
Child
,
R. M.
Nicklow
,
H. G.
Smith
,
R. M.
Moon
,
J. W.
Cable
,
Phys. Rev. Lett.
24
,
16
(
1970
).
9.
H. Bjerrum
Mo/ller
,
J. G.
Houmann
,
Phys. Rev. Lett.
16
,
737
(
1966
);
A. R. Mackintosh, H. Bjerrum Mo/ller, reference 2, chapter 5.
10.
M.
Nielsen
,
H. Bjerrum
Mo/ller
,
P. A.
Lindgärd
,
A. R.
Mackintosh
,
Phys. Rev. Lett.
25
,
1451
(
1970
);
J. G.
Houmann
,
J.
Jensen
,
P.
Touborg
,
Phys. Rev. B
12
,
332
(
1975
).
11.
J.
Ho/g
,
P.
Touborg
,
Phys. Rev. B
14
,
1209
(
1976
).
12.
T.
Johansson
,
B.
Lebech
,
M.
Nielsen
,
H. Bjerrum
Möller
,
A. R.
Mackintosh
,
Phys. Rev. Lett.
25
,
524
(
1970
);
B.
Lebech
,
B. D.
Rainford
,
J. Phys. (Paris)
32
,
370
(
1971
);
B.
Lebech
,
K. A.
McEwen
,
P. A.
Lindgärd
,
J. Phys. C.
8
,
1684
(
1975
).
13.
K. A.
McEwen
,
G. J.
Cock
,
L. W.
Roeland
,
A. R.
Mackintosh
,
Phys. Rev. Lett.
30
,
287
(
1973
).
14.
B. D.
Rainford
,
J. G.
Houmann
,
Phys. Rev. Lett.
26
,
1254
(
1971
);
J. G.
Houmann
,
M.
Chapellier
,
A. R.
Mackintosh
,
P.
Bak
,
O. D.
McMasters
,
K. A.
Gschneidner
, Jr
,
Phys. Rev. Lett.
34
,
587
(
1975
).
15.
J. D. Axe, G. Shirane, PHYSICS TODAY, Sept. 1973, page 32.
This content is only available via PDF.
You do not currently have access to this content.