Eric D. Esau

Publication Date

1986

Document Type

Dissertation/Thesis

First Advisor

Sill, Larry R.

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Physics

LCSH

Rare earth metal compounds--Magnetic properties; Silver compounds--Magnetic properties; Gallium compounds--Magnetic properties

Abstract

The magnetic properties of compounds in the series RAgGa (where R is a lanthanide rare earth) have heen measured at temperatures from 3 to 300 K at fields up to 26 kilogauss. The members of the series measured were PrAgGa, NdAgGa, SmAgGa, GdAgGa, TbAgGa, DyAgGa, HoAgGa, ErAgGa, and TmAgGa. The crystal structure of these compounds is body-centered orthorhombic of CeCu2 type with space group Imma. Above 60 K, all compounds are paramagnetic with all compounds except SmAgGa clearly exhibiting Curie- Weiss type behavior. At lower temperatures, GdAgGa, HoAgGa, ErAgGa, and SmAgGa order ferromagnetically, DyAgGa orders metamagnetically, and TbAgGa orders antiferromagnetically. PrAgGa and TmAgGa almost order ferromagnetically at the lowest observed temperatures. Paramagnetic Curie temperatures do not follow the DeGennes law for this series, but effective moments show good agreement with the ground state values of L, S, and J predicted by the Hund rules.

Comments

Bibliography: leaf [144]

Extent

viii, 142, [2] pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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