Non-Fermi-liquid scaling of the magnetic response in UCu{sub 5{minus}{ital x}}Pd{sub {ital x}}({ital x}=1,1.5)
- The Harrison M. Randall Laboratory of Physics, University of Michigan, Ann Arbor, Michigan 48109-1120 (United States)
We have determined the magnetic response {ital S}({omega}) of UCu{sub 5{minus}{ital x}}Pd{sub {ital x}}({ital x}=1,1.5) for temperatures {ital T} ranging from 12 to 300 K and energy transfers {omega} from 0.5 to 200 meV. {ital S}({omega}) is virtually identical in the two compounds, displaying localized moment dynamics for {omega}{approx_gt}25 meV. For {omega}{lt}25 meV, temperature provides the only energy scale for the magnetic excitations with the dynamical susceptibility described by a universal scaling function {chi}{double_prime}({omega},{ital T}){similar_to}{omega}{sup {minus}1/3}{ital Z}({omega}/{ital T}). We argue that {ital S}({omega}) represents critical scattering associated with a {ital T}=0 phase transition, whose origin lies with the magnetic screening of individual uranium ions.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 83986
- Journal Information:
- Physical Review Letters, Vol. 75, Issue 4; Other Information: PBD: 24 Jul 1995
- Country of Publication:
- United States
- Language:
- English
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