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Prog. Theor. Phys. Vol. 33 No. 5 (1965) pp. 795-811

[ Full Text PDF : FREE ACCESS (1133K) ]

Localized Spin Waves in Ferromagnets with an Antiferromagnetic Impurity

Hiroumi Ishii, Junjiro Kanamori and Tuto Nakamura*

Department of Physics, Osaka University, Toyonaka, Osaka
*Faculty of Engineering Science, Osaka University, Toyonaka, Osaka

(Received January 4, 1965)

Abstract:

The localized spin wave modes are studied theoretically for insulating ferromagnet with an antiferromagnetic impurity, on the basis of the Heisenberg model with particular reference to the simple cubic lattice. Besides localized p and d modes, which are of the same type as seen in ferromagnet with a ferromagnetic impurity, we have one or two localized s modes for the present case depending on certain conditions. One of them is an antiferromagnetic mode, which comes out of the bottom of the spin wave band. This has no analogue in ferromagnet with a ferromagnetic impurity. The condition for the appearance of localized s modes, the zero-point contraction of spins, and the frequency shirt of localized modes due to magnetic field and anisotropy energy are studied.


URL : http://ptp.ipap.jp/link?PTP/33/795/
DOI : 10.1143/PTP.33.795

[ Full Text PDF : FREE ACCESS (1133K) ] Citation:

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Citing Article(s) :

  1. Journal of the Physical Society of Japan 60 (1991) pp. 3818-3822 :
    Impurity Susceptibility in the Ising-LikeAntiferromagnet CoCl22H2O
    Akio Nakanishi and Muneyuki Date
  2. Progress of Theoretical Physics Vol. 40 No. 3 (1968) pp. 452-461 :
    A Low-Lying Magnon Resonant Mode in an Impure Heisenberg Ferromagnet
    Shozo Takeno and Sigeo Homma
  3. Progress of Theoretical Physics Vol. 40 No. 6 (1968) pp. 1195-1226 :
    Theory of Spin-Wave Impurity States in an Antiferromagnet
    Takashi Tonegawa
  4. Progress of Theoretical Physics Vol. 51 No. 4 (1974) pp. 973-987 :
    Localized Spin Wave States in Ferrimagnets
    Toshijiro Tanaka, Sumio Terakawa and Sasuke Miyazima
  5. Progress of Theoretical Physics Vol. 55 No. 1 (1976) pp. 10-20 :
    Localized Spin Wave State in a One-Dimensional Heisenberg Ferromagnet with a Boundary and Impurity Spins
    Yoshihiro Tsuchida

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