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

Journal Article · Mon Apr 14 00:00:00 EDT 2014 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.89.161108· OSTI ID:1253600

Shivaram, B. S.; Dorsey, Brian; Hinks, D. G.; Kumar, Pradeep

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.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division; National Science Foundation (NSF)
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1253600
• Journal Information: Physical Review, B: Condensed Matter, Vol. 89, Issue 16; ISSN 0163-1829
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English