Spin-phonon interaction and mode softening in NiF2

Магнетизм

Автор(и)

  • D. J. Lockwood Institute for Microstructural Sciences, National Research Council, Ottawa, ON KIA OR6

DOI:

https://doi.org/10.1063/1.1496657

Ключові слова:

PACS: 78.30.Hv, 75.50.Ee, 63.20.Dj, 63.20.Kr

Анотація

The temperature dependence of the four Raman-active phonons in NiF2 has been investigated at temperatures above and below the antiferromagnetic ordering temperature of TN=73 K. All four modes exhibit distinct anomalies in their intensities and frequencies near TN due to spin-phonon coupling. The phonon linewidths also exhibit weak anomalies. From the temperature dependences of the phonon frequencies, estimates are made of the spin-phonon coupling coefficients. The B1g phonon exhibits anomalous mode softening with decreasing temperature from 300 K to TN .

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Опубліковано

2002-06-10

Як цитувати

(1)
Lockwood, D. J. Spin-Phonon Interaction and Mode Softening in NiF2: Магнетизм. Fiz. Nizk. Temp. 2002, 28, 709-715.

Номер

Том 28 № 7 (2002)

Розділ

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