Magnetic, Thermal and Transport Properties of High-Pressure Synthesized Nanocrystalline EuC6

A.V. Tsvyashchenko; V.A. Sidorov; L.N. Fomicheva; J.D. Thompson; F. Ronning; A.N. Ponomarev

doi:10.4028/www.scientific.net/SSP.152-153.229

Paper Titles

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SQUID-Based Relaxometric Diagnostics of Magnetic Nanoparticles
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Nanostructures Based on Glasses Doped with 3d and 4f Elements
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Dynamics of Magnetization in Frustrated Spin-Chain Systems: Ca₃Co₂O₆
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Magnetic, Thermal and Transport Properties of High-Pressure Synthesized Nanocrystalline EuC₆
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Magnetic Phase Diagram and Magnetization Dynamics of Frustrated Spin-Chain Compounds
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Magnetoresistive Properties of Tb/Ti and Tb/Si Multilayers
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Magnetic Force Microscopy on Co/Pt Multilayers
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Finite Size Effects in Field-Induced Transitions in Magnetic Multilayers
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Magnetic, Thermal and Transport Properties of High-Pressure Synthesized Nanocrystalline EuC₆

Abstract:

Bulk nanocrystalline EuC6 was prepared by the route of high pressure and high temperature synthesis. The material exhibits ferromagnetic behavior at low temperature. Its magnetic moment saturates at 2 K and 6 T to a value s ~0.64 B/f.u. The magnetic susceptbility obeys the Curie-Weiss law above ~60 K and the value of paramagnetic moment and Curie-Weiss temperature were found to be eff = 2.48 B and p = +12.5 K, respectively. Magnetic measurements show that europium atoms in the pressure synthesized EuC6 are not in a purely Eu+2 state but rather in a mixed-valence state.