Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-06-08
Physics
Condensed Matter
Strongly Correlated Electrons
6 pages,5 figures
Scientific paper
We have demonstrated the effect of pressure on magnetization jump and its associated magnetostriction in Eu$_{0.58}$Sr$_{0.42}$MnO$_{3}$. The critical field lowered by the applied pressure is explained by a suppression of the metastable blocked state, which is inherent to the phase separated manganite system exhibiting the magnetic avalanche. To reduce a factor of the bad thermal coupling in the bulk sample, and to further examine the nature of the magnetization jump, we have performed the influence of pressure on the isothermal magnetization of the powder sample. There is no discrepancy in the critical field between the bulk and powder samples although the $MH$ curve of the latter is not saturated at high fields. These findings indicate a crucial role of the frozen phase separated state in the abrupt transition.
Inomata Tasuku
Kobayashi Norio
Kobayashi Satoru
Koyama Keiichi
Matsukawa Michiaki
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