Magnetic behavior of an S=½ amorphous antiferromagnet

Kummer, R. B. ; Walstedt, R. E. ; Geschwind, S. ; Narayanamurti, V. ; Devlin, G. E. (1978) Magnetic behavior of an S=½ amorphous antiferromagnet Physical Review Letters, 40 (16). pp. 1098-1101. ISSN 0031-9007

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The magnetic behavior of bound shallow donors in CdS, a model S=½ amorphous antiferromagnet, has been measured by a Faraday rotation technique down to T~50 mK. The susceptibility, X, and dX/dT as well increase monotonically with decreasing T with no sign of an ordering transition even though the median exchange interaction of a spin is ~7 K. The results agree with a hydrogeniclike exchange model which is solved in terms of exactly diagonalized weakly interacting clusters.

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Deposited On:23 Dec 2010 12:53
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