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Magnetic fingerprints of the very fast jumps of colossal magnetoresistance in the phase-separated manganite La0.225Pr0.40Ca0.375MnO3
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We found that colossal variations of resistance in
La
0.225
Pr
0.40
Ca
0.375
Mn
O
3
in about
100
μ
s
occur simultaneously with magnetic avalanches that last about
1
ms
. These findings are interpreted as macroscopic fingerprints of the percolative phase separation upon application of the external magnetic field. Depending on the fraction of the ferromagnetic phase
x
, the colossal magnetoresistance jumps appear to be caused either by fluctuations of
x
, accompanied by fast propagation of the magnetic avalanches through the sample, or by a phase transition from charge ordered antiferromagnetic phase to charge delocalized ferromagnetic phase.
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MACIÀ BROS, Ferran, et al. Magnetic fingerprints of the very fast jumps of colossal magnetoresistance in the phase-separated manganite La0.225Pr0.40Ca0.375MnO3. Physical Review B. 2008. Vol. 77, num. núm 1, pags. 012403-1-012403-4. ISSN 0163-1829. [consulted: 6 of October of 2026]. Available at: https://hdl.handle.net/2445/10930