Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1819369 | Physica C: Superconductivity and its Applications | 2009 | 4 Pages |
Abstract
We have performed the detailed measurements of temperature dependence of magnetization M(T) on MgB2 single crystals in a wide range of field H using torque magnetometry. In a field region, where the peak effect in M(H) is observed, we find that M(T) of the warming branch increases monotonously with T and exhibits a small step-like increase at T1â, which is related to the order-disorder transition, while M(T) of the cooling branch, showing the larger values than that in warming branch below T1â, drops suddenly toward the warming branch at T2â. We ascribe this anomalous behavior of M(T) of the cooling branch to a supercooling phenomenon of disordered phase, which transforms to the ordered state at T2â.
Related Topics
Physical Sciences and Engineering
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Condensed Matter Physics
Authors
M. Chotoku, T. Nojima, A. Ochiai, H. Aoki, H.-G. Lee, S.-I. Lee,