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Title: Universality in the magnetic response of metamagnetic metals.

We report measurements of the nonlinear susceptibility chi(3)(T) in the metamagnetic heavy fermion (HF) compound UPt3. At high temperatures, chi(3)(T) < 0 and is small. It turns positive for T <= 35 K, forms a peak at T congruent to 10 K, and then decreases to zero with further decreasing temperature. The peak in chi(3) occurs at a temperature T-3, which is roughly half of T-1, the temperature of the maximum in the linear susceptibility. We present results on URu2Si2 and UPd2Al3 to show that this feature is common to other HF materials. A two-level model to describe the metamagnetic transition, with separation between the levels being the only energy scale, captures all experimentally observed features.
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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: 24
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
Country of Publication:
United States