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Temperature variation of the field-dependent spin reduction in the one-dimensional antiferromagnets: K2FeF5 and Rb2FeF5

G P Gupta, D P E Dickson and C E Johnson

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Mossbauer spectra of single crystals of K2FeF5 and Rb2FeF5 show that, in accordance with spin-wave theory, the spin reduction resulting from the application of an external magnetic field, which is enhanced in one-dimensional antiferromagnets, decreases significantly when the temperature is lowered. In addition, the value of the critical field for spin flopping in K2FeF5 is reduced on lowering the temperature.


PACS

75.50.Ee Antiferromagnetics

76.80.+y Mössbauer effect; other γ-ray spectroscopy

75.30.Ds Spin waves

75.30.Sg Magnetocaloric effect, magnetic cooling

Subjects

Condensed matter: electrical, magnetic and optical

Dates

Issue 12 (28 June 1979)



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