Destruction of Superconductivity at the Onset of Long-Range Magnetic Order in the Compound Er<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Rh</mi></mrow><mrow><mn>4</mn></mrow></msub></mrow></math></span><span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">B</mi></mrow><mrow><mn>4</mn></mrow></msub></mrow></math></span>

W. A. Fertig; D. C. Johnston; L. E. DeLong; R. W. McCallum; M. B. Maple; B. T. Matthias

doi:10.1103/PhysRevLett.38.987

Destruction of Superconductivity at the Onset of Long-Range Magnetic Order in the Compound Er ${Rh}_{4}$ $B_{4}$

W. A. Fertig, D. C. Johnston, L. E. DeLong, R. W. McCallum, M. B. Maple, and B. T. Matthias

Phys. Rev. Lett. 38, 987 – Published 25 April 1977

Abstract

The compound Er ${Rh}_{4}$ $B_{4}$ becomes superconducting at a critical temperature $T_{c 1}$ of 8.7 K followed by a return to the normal state at a second critical temperature $T_{c 2}$ of 0.9 K. The return to the normal state at $T_{c 2}$ is coincident with the occurrence of long-range ordering of the magnetic moments of the ${Er}^{3 +}$ ions which completely occupy a set of equivalent lattice sites.

Received 30 March 1977

DOI:https://doi.org/10.1103/PhysRevLett.38.987

Authors & Affiliations

W. A. Fertig^*,†, D. C. Johnston^‡, L. E. DeLong^*, R. W. McCallum^*, and M. B. Maple^*

Institute for Pure and Applied Physical Science, University of California, San Diego, La Jolla, California 92093

B. T. Matthias^‡

Institute for Pure and Applied Physical Sciences, University of California, San Diego, La Jolla, California, 92093, and Bell Laboratories, Murray Hill, New Jersey 07974

^*Research supported by the U. S. Energy Research and Development Administration under Contract No. ERDA E(04-3)-34 PA227.
^†National Science Foundation Postdoctoral Fellow.
^‡Research Sponsored by the Air Force Office of Scientific Research, Air Force Systems Command, U. S. Air Force under AFOSR Contract No. F49620-77-C-0009.