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Magnetic Structure and Thermal Expansion of Eu4Ga8Ge16

Published online by Cambridge University Press:  11 February 2011

Henrik Birkedal ,
J. Daniel Bryan ,
Galen. D. Stucky ,
Mogens Christensen  and
Bo B. Iversen
Henrik Birkedal
Affiliation:
Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106, USA.
J. Daniel Bryan
Affiliation:
Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106, USA.
Galen. D. Stucky
Affiliation:
Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106, USA.
Mogens Christensen
Affiliation:
Department of Chemistry, University of Aarhus, Langelandsgade 140, 8000 Århus C, Denmark.
Bo B. Iversen
Affiliation:
Department of Chemistry, University of Aarhus, Langelandsgade 140, 8000 Århus C, Denmark.
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Abstract

The orthorhombic clathrate compound Eu4Ga8Ge16 orders antiferromagnetically at about 8 K. The magnetic structure is established by neutron powder diffraction while the thermal expansion and atomic displacement parameters are studied by synchrotron powder diffraction. The Eu spins align along the a-axis and achieve a zero-temperature magnetic moment equivalent to that of the free Eu2+ ion. The thermal expansion is largest along the a-axis while the expansion along c has almost the same magnitude as that along b. The Eu displacement parameters display significant residual values at 0 K, largest in the c direction.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 755: Symposium DD – Solid-State Chemistry of Inorganic Materials IV , 2002 , DD10.2
Copyright
Copyright © Materials Research Society 2003

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