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Title: Metamagnetism and the fifth-order susceptibility in UPt{sub 3}.

An enhanced susceptibility is a natural consequence of the "heavy fermion" (HF) state, rendering the possibility of measurably large nonlinear susceptibilities. In recent work a universal behavior of the peaks observed in the linear (chi(1)) and the third-order (chi(3)) susceptibility in HF metamagnets has been identified. This universality is well accounted for by a single energy scale model considering on-site correlations only. A prediction of this model is a peak in the fifth-order susceptibility chi(5) as well. In measurements on a HF metamagnet, UPt3, reported herein, we find that chi(5), rather than attaining a peak, saturates at low temperatures and is positive. The thermodynamic implications of these towards the stability of the metamagnetic HF state are discussed.
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Publication Date:
OSTI Identifier:
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review, B: Condensed Matter; Journal Volume: 89; Journal Issue: 16
American Physical Society (APS)
Research Org:
Argonne National Laboratory (ANL)
Sponsoring Org:
USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division; National Science Foundation (NSF)
Country of Publication:
United States