著者

Miyazima Sasuke Tanaka Tomoyasu

出版者

一般社団法人日本物理学会

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.56, no.2, pp.441-443, 1987-02-15

被引用文献数

3 5

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Diffusion limited aggregation is generalized to include a method of ensembleaverage, and is applied to the sirnulati'on of a snowflake as an example.

著者

NISHIUMA Saburo/MIYAZIMA Sasuke Miyazima Sasuke

出版者

一般社団法人日本物理学会

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.69, no.3, pp.981-982, 2000-03-15

著者

Miyazima Sasuke

出版者

一般社団法人日本物理学会

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.35, no.1, pp.68-76, 1973-07-05

被引用文献数

8

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The phase transition temperature are calculated for two kinds of models for n-layer Ising lattices. One is diluted by non-magnetic impurities and the other consists of two kinds of magnetic substances. When the number of layers n increases, the transition temperature calculated by the high temperature series expansion increases monotonically. In the first model the critical concentration p_c decreases with n. Although a single layer lattice with p<p_c shows no spontaneous magnetization, there is possibility of giving rise the spontaneous magnetization when we compile several films. In the second model we can find various types of variation for critical temperature depending on the exchange coupling, especially between two different substances. Both in dilute ferromagnets and in ferromagnetic solid solutions, a simple relation may exist between the shift of transition temperatures and the number of layers. The shift of critical concentration also follows the similar simple relation.

著者

Miyazima Sasuke OKIJI Ayao

出版者

一般社団法人日本物理学会

雑誌

Journal of the Physical Society of Japan (ISSN:00319015)

巻号頁・発行日

vol.32, no.5, pp.1188-1201, 1972-05-05

被引用文献数

5

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The localized spin wave associated with two different impurities in an insulating b.c.c. antiferromagnet is investigated within the linear spin wave theory. The four cases with regard to the relative position of two impurities which include the case of nearest neighbor positions are considered. The energy of localized spin wave is calculated for the various values of exchange integrals and the magnitude of impurity spin. It may be concluded that some of the localized spin wave modes of the first impurity are not affected even if the second impurity is on the vicinity of the first impurity. When the same two impurities are on the same sublattice the larger interferential effect on the localized spin wave energy is induced than on the different sublattice. The dependence of localized spin wave energy on the distance between two impurities is discussed briefly.