Magnetic structure,phase diagram,and a new type of spin-flop transition dominated by higher order interaction in a localized 5f system U3Pd20Si6 |
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| Authors: | Koike Y Metoki N Haga Y McEwen K A Kohgi M Yamamoto R Aso N Tateiwa N Komatsubara T Kimura N Aoki H |
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| Institution: | Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki, 319-1195, Japan. |
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| Abstract: | The magnetic structure of the localized-5f uranium intermetallic compound U3Pd20Si6 has been determined by means of a neutron diffraction experiment. Our data demonstrate that this compound has a collinear coupling of the sublattice ordering of the uranium spins on the 4a and 8c sites. We conclude that higher-order exchange and/or quadrupole interactions are necessary to stabilize this unique collinear structure. We discovered a new type of spin-flop transition against the uniaxial anisotropy induced by this collinear coupling. |
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