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Abstract

The dependence of the Curie temperature T(c) of the ferromagnetic compounds UX (X = S, Se or Te) on hydrostatic pressure to 13 GPa has been determined using a diamond-anvil cell loaded with dense helium as pressure medium. A sensitive primary/secondary coil system allows the detection of the ferromagnetic transition in the ac susceptibility for tiny samples with mass </= 1 µg. The Curie temperatures of USe (170 K) and UTe (102 K) initially increase with applied pressure at the rates +2.7 K/GPa and +13.3 K/GPa, passing through maxima at pressure of approximately 6 GPa and 7 GPa, respectively. T(c) for US (173 K) decreases monotonically under pressure at the rate -3.9 K/GPa. For all three chalcogenides the pressure dependence of T(c) is clearly influenced by structural phase transitions. The present results are compared to those from earlier resistivity studies and discussed within the framework of both a phase diagram proposed by Doniach for local-movement Kondo-lattice systems and pressure-dependent itinerant electron magnetism.

Additional information

Authors: CORNELIUS A L, Washington University, Department of Physics, St Louis (US);SCHILLING J S, Washington University, Department of Physics, St Louis (US);VOGT O, Eidgenössiche Technische Hochschule, Laboratorium für Festköperphysik, Zürich (CH);MATTENBERGER K, Eidgenössiche Technische Hochschule, Laboratorium für Festköperphysik, Zürich (CH);BENEDICT U, JRC Karlsruhe (DE)
Bibliographic Reference: Article: Journal of Magnetism and Magnetic Materials, Vol. 161 (1996), pp. 169-176
Record Number: 199710405 / Last updated on: 1997-04-23
Category: PUBLICATION
Original language: en
Available languages: en