Frustrated antiferromagnetic(AFM) order in CeCd<sub>3</sub>As<sub>3</sub>
ORAL
Abstract
The relatively unexplored compound CeCd3As3 crystallizes in the P63/mmc space group, and has geometrically frustrated triangular arrangements of magnetic cerium atoms in the a/b plane. Magnetization measurements indicate strong out of plane AFM interactions. Our heat capacity, C(T), measurements on a single crystal reveal a sharp peak at TN = 420 mK in zero field, consistent with an out of plane AFM phase transition. Applying a magnetic field within the easy-plane raises TN to 490 mK at 2 T demonstrating lifting of frustration. At high fields TN is suppressed to zero, and C(T) no longer resembles that of an AFM. Instead we observed an excess of entropy at the lowest temperatures measured. These results indicate competition between AFM order and frustration at low fields, and a field induced highly degenerate ground state at stronger fields.
*Work was conducted at Los Alamos National Laboratory under the auspices of the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering. KEA and WPH acknowledge the U.S. Dept. of Energy DE-FG02-05ER46248, and the Northwestern Center for Applied Physics and Superconducting Technology. A portion of this work was supported by the Los Alamos Laboratory Directed Research and Development program
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Presenters
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Keenan Avers
- Physics, Northwestern University