Modulated ferromagnetic ordering and the magnetocaloric response of Eu{sub 4}PdMg

Journal Article · Thu May 07 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4907239· OSTI ID:22410053

Legros, Anaëlle ^[1]; Niehaus, Oliver; Pöttgen, Rainer ^[2]; Cadogan, J. M. ^[3]; Flacau, R. ^[4]

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1. Physics Department and Centre for the Physics of Materials, McGill University, 3600 University Street, Montreal, Quebec H3A 2T8 (Canada)
2. Institut für Anorganische und Analytische Chemie, Westfäliche Wilhelms-Universität Münster, Corrensstrasse 30, 48149 Münster (Germany)
3. School of Physical, Environmental and Mathematical Sciences, UNSW Canberra at the Australian Defence Force Academy, Canberra BC, Australian Capital Territory 2610 (Australia)
4. Canadian Neutron Beam Centre, Chalk River Laboratories, Ontario K0J 1J0 (Canada)

Neutron powder diffraction confirms that the primary ordering mode in Eu{sub 4}PdMg is ferromagnetic with a europium moment of 6.5(2) μ{sub B}. {sup 151}Eu Mössbauer spectroscopy shows that the unusual linear temperature dependence of the magnetisation reported for this system is an intrinsic property and not an artefact of the applied field. The form and temperature evolution of the {sup 151}Eu Mössbauer spectra strongly suggest that there is an incommensurate modulation to the magnetic structure that modifies the basic ferromagnetic order. This modulated structure may be the origin of the broad magnetocaloric response previously observed in Eu{sub 4}PdMg.

• OSTI ID: 22410053
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
ABSORPTION SPECTROSCOPY
EUROPIUM
EUROPIUM 151
FERROMAGNETIC MATERIALS
FERROMAGNETISM
INTERMETALLIC COMPOUNDS
MAGNESIUM
MAGNETIZATION
MODULATION
MOESSBAUER EFFECT
NEUTRON DIFFRACTION
PALLADIUM
TEMPERATURE DEPENDENCE