Specific Heat of Pure and Thoriated UBe13 at Low Temperatures in High Magnetic Fields

Authors

M. J. Graf, Boston College
Nathanael A. Fortune, Boston University
J. S. Brooks, Boston University
J. L. Smith, Los Alamos National Laboratory
Z. Fisk, Los Alamos National Laboratory

Document Type

Article

Publication Date

1-1-1989

Publication Title

Physical Review B

Abstract

We have measured the specific heat of pure and thoriated (3.3% thorium) UBe13 in the temperature interval 0.3 1.8 K in applied magnetic fields up to 20 T, and find striking qualitative differences between the two systems. For pure UBe13 the electronic coefficient of specific heat el(=Cel(T)/T) is noticeably suppressed by a field of 20 T at 1.8 K; below 1 K, however, this reduction from the low-field, normal-state value tends to zero. For the 3.3% thoriated sample, the high-temperature value of el is relatively insensitive to strong magnetic fields, but at lower temperatures the suppression of el becomes much stronger, reaching nearly 40% at 0.35 K in a field of 20 T. This behavior is similar to that observed in most cerium-based heavy-fermion systems.

Volume

40

Issue

13

First Page

9358

Last Page

9361

DOI

10.1103/PhysRevB.40.9358

ISSN

01631829

Rights

© 1989 The American Physical Society.

Comments

Archived as published.

Recommended Citation

Graf, M. J.; Fortune, Nathanael A.; Brooks, J. S.; Smith, J. L.; and Fisk, Z., "Specific Heat of Pure and Thoriated UBe13 at Low Temperatures in High Magnetic Fields" (1989). Physics: Faculty Publications, Smith College, Northampton, MA.
https://scholarworks.smith.edu/phy_facpubs/85