Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2004-09-03
Physics
Condensed Matter
Strongly Correlated Electrons
14 pages, 4 figures, 1 Table
Scientific paper
10.1143/JPSJ.74.1270
We report a detailed investigation into the metamagnetism of Sr3Ru2O7 at low temperatures for the magnetic field parallel to the ruthenium oxygen planes. The metamagnetism is studied as a function of temperature, magnetic field and sample quality using magnetisation, magnetotransport and specific heat as probes. From hysteretic behaviour in the magnetisation, we confirm earlier work and observe a finite temperature critical point at (5 T, >0.25 K). In our highest quality samples two-step metamagnetic transitions are additionally observed at 5.8 T and at 6.3 T, which coincide with a range of broad maximum in the magnetoresistance. At low temperatures, these two metamagnetic features each further split in two. Such behaviour of the multiple transitions are qualitatively different from the first order transition at 5.1 T.
Ishida Kenji
Kitagawa Kentaro
Maeno Yoshiteru
Perry Robin S.
Sakakibara Toshiro
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