Journal ArticleDOI
U(Fe1−xNix)AlHy system: new hydride phases, structural and magnetic properties
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In this paper, the authors report the hydriding characteristics of U(Fe1−xNix)AlHy, with x=0.85, and show that the resulting hydrides with y⩾2 result in U-5f-electron localization and antiferromagnetic ordering.Abstract:
We report the hydriding characteristics of U(Fe1−xNix)AlHy, with x=0.85. It is found that (i) U(Fe0.15Ni0.85)Al can be hydrided to a maximum of y≈2.4 and the hydride shows antiferromagnetic ordering with T N ≈70 K , and (ii) new single phase orthorhombic hydrides can be stabilized for x⩾0.85. From our hydriding and magnetic studies on all the compositions in this series of compounds, including our earlier work, it is found that irrespective of the magnetic state of the parent composition, the hydrides with y⩾2 result in U-5f-electron localization and antiferromagnetic ordering. Structural and magnetic studies have also been carried out on the orthorhombic hydride phases and these are found not to order down to 2 K .read more
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Chapter Five Magnetism of Hydrides
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Hydriding of the mixed-valent compound CeRhIn: structural and magnetization studies
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TL;DR: In this paper, a mixed-valent compound, CeRhIn, having the hexagonal Fe 2 P-type structure and a moderate value of the Kondo temperature (T K ∼150 K), is found to form two distinct hydride phases.
Journal ArticleDOI
Hydrogen induced antiferromagnetic ordering and structural changes in U(Co0.3Ni0.7)AlH2.2
K. Shashikala,Adarsh Jagan Sathyamoorthy,Piyush Raj,S. K. Dhar,Darshan C. Kundaliya,S. K. Malik +5 more
TL;DR: In this paper, the parent compound U(Co0.3Ni0.7)Al is shown to form a hydride with composition UNiAlH2.2, where the Ni content (x) is > 0.5.
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Onset of magnetism stimulated by H absorption in UNiAl- UFeAl
Silvie Mašková,Ladislav Havela,Stanislav Daniš,Karunakar Kothapalli,Farzana Nasreen,Alexander V. Andreev +5 more
TL;DR: In this article, the authors describe UNi0.75Fe0.85Al hydride as an antiferromagnet with TN approx. 70 K and show that it is unstable, releasing H at ambient conditions, which made it unsuitable for specific heat measurement.
References
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Journal ArticleDOI
Magnetic phase diagram of the UFe1-xNixAl system.
Journal ArticleDOI
The hydriding behaviour of U(Fe1−xNix)Al system (0≤x≤0.75) and magnetic studies on U(Fe1−xNix)AlH0.8
TL;DR: In this paper, the authors investigated the hydriding behavior of the solid-solution series of compounds, U(Fe 1− x Ni x )Al, and found that the magnetic properties change from exchange enhanced Pauli-paramagnetic and spin fluctuating ( x = 0), via weakly magnetic with no long range magnetic ordering down to 4 K (0 x ≤ 0.3) to ferromagnetic (0.35≤ x ≤0.75) and eventually to antiferromagnetic for x ≥ 0.9.
Journal ArticleDOI
Structure and magnetic studies on UNiAlD2.2
TL;DR: In this article, the authors present neutron diffraction studies on UNiAlDy (y=2.2) to resolve controversies with regard to the occupancy of Ni atoms and the associated interstitial sites for (H/D) atoms, as well as the nature of magnetic ordering in the higher hydride phase with y⩾2.3.