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Condensed Matter Seminars

ics Condensed Matter
Thursday, January 29, 2015
3:30 PM
Physics Building, Room 204
Note special time.
Note special room.
Bellave Shivaram & Vittorio Celli [Host: Utpal Chatterjee]
University of Virginia
"Metamagnetism"
ABSTRACT:

A metamagnet (MM) is characterized by the sharp rise of the low-temperature magnetization at a critical field Bc. Other MM properties that become singular at T=0 and B= Bc include specific heats, magnetostriction, and sound velocities. Metamagnetism occurs in single molecules as well as in solids, and is not a phase transition in the classical sense; however, distinctive MM features are also seen at finite T for all B. We will present new data on macromolecules and heavy-fermion metals, such as UPt3, and show how these systems are well described by a simple two-levels model, which appears to be applicable to all MMs, when suitably extended.

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