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Synthesis of New Alkali-Metal-Intercalated Layered-Silicate Compounds and Their Magnetic Properties

Published online by Cambridge University Press:  15 February 2011

N. Wada ,
Hideaki Okui ,
Yasuyuki Omura ,
Akihiko Fujiwara ,
Hiroyoshi Suematsu  and
Youichi Murakami
N. Wada
Affiliation:
Faculty of Engineering, Toyo University, Kawagoe City, Japan350, nwada@krc.eng.toyo.ac.jp
Hideaki Okui
Affiliation:
Faculty of Engineering, Toyo University, Kawagoe City, Japan350, nwada@krc.eng.toyo.ac.jp
Yasuyuki Omura
Affiliation:
Faculty of Engineering, Toyo University, Kawagoe City, Japan350, nwada@krc.eng.toyo.ac.jp
Akihiko Fujiwara
Affiliation:
Department of Physics, University of Tokyo, Tokyo, Japan113
Hiroyoshi Suematsu
Affiliation:
Department of Physics, University of Tokyo, Tokyo, Japan113
Youichi Murakami
Affiliation:
National Laboratory for High Energy Physics, Tsukuba, Japan305
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Abstract

Single crystals and powders of vermiculite are dehydrated and then intercalated with alkali metals (K and Rb) using a two-temperature-zone furnace. The samples, originally transparent, exhibit metallic silver color upon intercalation. Our x-ray diffraction experiments indicate that the c-axis lattice constant becomes smaller after the intercalation process. A SQUID magnetometer is used to measure the magnetization of the samples as functions of temperature and magnetic field. Evidence for Pauli paramagnetism and enhancement of ferromagnetism are found in the Rb- and K-intercalated compounds, in addition to Curie paramagnetism due to iron impurities in the original vermiculite.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 453: Symposium R – Solid State Chemistry of Inorganic Materials , 1996 , 95
Copyright
Copyright © Materials Research Society 1997

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References

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