Study of the Heavy Fermion/Spin-Glass System, Ce1-x Gdx Al3, Using 155Gd Mossbauer Spectroscopy

Date of Award

Fall 12-1991

Document Type


Degree Name

Master of Science (MS)



Committee Director

Desmond C. Cook

Committee Member

Gilbert Hoy

Committee Member

Wynford Harries

Committee Member

Jacob Becher

Call Number for Print

Special Collections LD4331.P48R84


The magnetic properties of Ce1-xGdx.Al3 have been studied using 155Gd Mossbauer spectroscopy. It has been shown that the magnetic moments of the host GdAl3 are constrained to the basal plane. The magnetic properties of GdAl3 can best be described in the framework of RKKY theory. Prior studies of Ce1-xGdxAl3, have revealed complex magnetic behavior throughout the series. As observed with Mossbauer spectroscopy magnetic ordering occurs for x ≥ 0.5, though not at the reported spin glass temperatures. For x = 0.23 and x = 0.18, the electronic properties measured are different than the higher concentration samples and this is attributed to an increased density of states at the Fermi level of non-s electrons.


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