Magnetic and structural transitions in EuAg4As2 studied using 151Eu Mössbauer spectroscopy
Source abstract
Abstract
151Eu Mössbauer spectroscopy confirms that the europium in EuAg4As2 is fully divalent and that the spectrum at 5 K consists of a single, sharp magnetic pattern with a hyperfine field (Bhf) of 27.1(1) T and an isomer shift of −11.04(3) mm/s (relative to EuF3). The temperature dependence of the spectra shows that the ordering of the Eu moments proceeds via an incommensurate sine modulated structure starting at 15 K. The structure squares up below 9 K. A search for charge density or phonon softening signatures at the 120 K structural transition was not successful.
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Research context
OpenAlex topics: Rare-earth and actinide compounds · Iron-based superconductors research · Magnetic and transport properties of perovskites and related materials
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Affiliations
Physics Department and Centre for the Physics of Materials, McGill University 1 , 3600 University Street, Montreal, Quebec H3A 2T8, Canada
Department of Physics and Astronomy and Ames Laboratory, Iowa State University 2 , Ames, Iowa 50011, USA
Department of Physics and Astronomy and California NanoSystems Institute, University of California Los Angeles 3 , Los Angeles, California 90095, USA
Funding
Fonds de Recherche du Québec - Nature et Technologies · Basic Energy Sciences
References (10)
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