Magnetic excitations of Er2PdSi3 studied by inelastic neutron scattering in fields up to 12 T

The series R2PdSi3 (R heavy rare earth) has been found to exhibit rich magnetic phase diagrams with a large variety of magnetic states. This complex magnetic behavior results from the interplay between RKKY interaction, magneto-crystalline anisotropy based on crystalline-electric field (CEF) effects...

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Bibliographic Details
Main Authors: Tang, Fei, Link, Peter, Frontzek, Matthias, Schneidewind, Astrid, Löser, Wolfgang, Loewenhaupt, Michael
Format: Conference Proceeding
Language:English
Subjects:
Anisotropy
Crystal structure
Crystallinity
Crystallography
Electric fields
Excitation spectra
Inelastic scattering
Magnetic fields
Magnetic properties
Neutron scattering
Neutrons
Phase diagrams
Physics
Single crystals
Superstructures
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Summary:The series R2PdSi3 (R heavy rare earth) has been found to exhibit rich magnetic phase diagrams with a large variety of magnetic states. This complex magnetic behavior results from the interplay between RKKY interaction, magneto-crystalline anisotropy based on crystalline-electric field (CEF) effects and geometric frustration due to the AlB2 derived hexagonal crystal structure. Within the series the Er2PdSi3 compound has been found to exhibit in zero field a simple CEF excitation spectrum with just one strong transition at 3.5 meV from the ground state to the first excited state. Neutron spectroscopy in magnetic fields up to 12 T has been performed on the cold-triple axis spectrometer PANDA at FRM II. In this study two transitions within the 3.5 meV excitation could be resolved showing a linear dependency in applied magnetic fields with an almost identical slope of μBgL for fields above 2 T. The results can be explained in a picture of two slightly different sets of CEF parameters for two inequivalent Er3+ sites due the crystallographic superstructure observed in all single crystals of type R2PdSi3.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/251/1/012004