Body‐centered tetragonal AlCr2 has been shown by neutron diffraction to be antiferromagnetic below the Néel temperature of 598°±5°K. The spin structure obtained from the neutron powder data is characterized by an antiferromagnetic coupling between the adjacent Cr layers in the c‐layer sequence, Al–Cr ↑ –Cr ↓ –Al–, where each Cr layer forms a ferromagnetic sheet. The magnetic moment of Cr is 0.92±0.02 Bohr magneton and the moment inclines 65±2° from the c axis. Neither crystal nor magnetic transition was observed below 598°K down to 1.6°K. The Debye temperature of AlCr2, 472±8°K, was obtained from the coherent nuclear‐scattering data.
REFERENCES
1.
2.
3.
4.
5.
M. Atoji, Argonne National Laboratory, Report No. 6920.
6.
G. E. Bacon, Neutron Diffraction (Clarendon Press, Oxford, England, 1962); 2nd ed., p. 275.
7.
American Institute of Physics Handbook, edited by D. W. Gray et al. (McGraw‐Hill Book Company, Inc., New York, 1963), 2nd ed., Chap. 4., p. 61.
8.
J. M.
Hastings
, N.
Elliott
, and L. M.
Corliss
, Phys. Rev.
115
, 13
(1959
).9.
10.
J.
Bardeen
, L. N.
Cooper
, and J. R.
Schrieffer
, Phys. Rev.
108
, 1175
(1957
).11.
12.
L. Pauling, The Nature of the Chemical Bond (Cornell University Press, Ithaca, New York, 1960), 3rd ed., p. 393.
13.
14.
G.
Shirane
and W. J.
Takei
, J. Phys. Soc. Japan
17
, Suppl. B‐III, 35
(1962
).15.
J. B. Goodenough, Magnetism and the Chemical Bond (Interscience Publishers, Inc., New York, 1963), p. 76.
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© 1965 American Institute of Physics.
1965
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