Irreversible photoinduced insulator-metal transition in charge ordered Pr0.75Na0.25MnO3

T. Satoh, Y. Kikuchi, K. Miyano, E. Pollert, J. Hejtmánek, Z. Jirák

Research output: Contribution to journalArticle

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Abstract

Irreversible photoinduced insulator-metal transition has been observed in a perovskite manganite doped with monovalent Na+, Pr 0.75Na0.25MnO3. The increase of the conductance is estimated to be of the order of 104-105, considering the shallow penetration depth (∼0.1 μm) of illumination light. Analysis of the dc- and ac-susceptibility data shows that the system is in a cluster glass state below 45K, which means that ferromagnetic metallic clusters exist in insulating matrix. The photo-excitation helps the clusters to dislodge from a local energy minimum and to seek more stable configuration. The observed large increase of the conductivity can be well explained by the percolative conduction. We argue that metastability is due to the large charge mismatch between the monovalent Na+ ion and trivalent Pr3+ ion or the deviation of the average Mn valency from 3.5+.

Original languageEnglish
Pages (from-to)935-940
Number of pages6
JournalPhase Transitions
Volume75
Issue number7-8
DOIs
Publication statusPublished - Jan 1 2002

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Metal insulator transition
transition metals
insulators
Ions
Photoexcitation
Perovskite
trivalent ions
Lighting
photoexcitation
Glass
metastable state
penetration
illumination
magnetic permeability
deviation
conduction
conductivity
glass
matrices
configurations

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Materials Science(all)

Cite this

Satoh, T., Kikuchi, Y., Miyano, K., Pollert, E., Hejtmánek, J., & Jirák, Z. (2002). Irreversible photoinduced insulator-metal transition in charge ordered Pr0.75Na0.25MnO3. Phase Transitions, 75(7-8), 935-940. https://doi.org/10.1080/01411590290034083

Irreversible photoinduced insulator-metal transition in charge ordered Pr0.75Na0.25MnO3. / Satoh, T.; Kikuchi, Y.; Miyano, K.; Pollert, E.; Hejtmánek, J.; Jirák, Z.

In: Phase Transitions, Vol. 75, No. 7-8, 01.01.2002, p. 935-940.

Research output: Contribution to journalArticle

Satoh, T, Kikuchi, Y, Miyano, K, Pollert, E, Hejtmánek, J & Jirák, Z 2002, 'Irreversible photoinduced insulator-metal transition in charge ordered Pr0.75Na0.25MnO3', Phase Transitions, vol. 75, no. 7-8, pp. 935-940. https://doi.org/10.1080/01411590290034083
Satoh T, Kikuchi Y, Miyano K, Pollert E, Hejtmánek J, Jirák Z. Irreversible photoinduced insulator-metal transition in charge ordered Pr0.75Na0.25MnO3. Phase Transitions. 2002 Jan 1;75(7-8):935-940. https://doi.org/10.1080/01411590290034083
Satoh, T. ; Kikuchi, Y. ; Miyano, K. ; Pollert, E. ; Hejtmánek, J. ; Jirák, Z. / Irreversible photoinduced insulator-metal transition in charge ordered Pr0.75Na0.25MnO3. In: Phase Transitions. 2002 ; Vol. 75, No. 7-8. pp. 935-940.
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