Persistent magnetoresistive memory in phase separated manganites

P. Levy, F. Parisi, J. Sacanell, L. Granja, M. Quintero, J. Curiale, G. Polla, G. Leyva, R. S. Freitas, L. Ghivelder, C. Acha, T. Y. Koo, Sang-Wook Cheong

Research output: Contribution to journalConference article

5 Scopus citations

Abstract

We have studied magnetic and transport properties on different manganese-oxide-based compounds exhibiting phase separation: polycrystalline La5/8-yPryCa3/8MnO3 (y = 0.3) and La1/2Ca1/2Mn1-zFezO3 (z = 0.05), and single crystals of La5/8-yPryCa3/8MnO3 (y∼0.35). Time dependent effects indicate that the fractions of the coexisting phases are dynamically changing in a definite temperature range. We found that in this range the ferromagnetic fraction "f" can be easily tuned by application of low magnetic fields (<1 T). The effect is persistent after the field is turned off; thus, the field remains imprinted in the actual value of "f" and can be recovered through transport measurements. This effect is due both to the existence of a true phase separated equilibrium state with definite equilibrium fraction "f0", and to the slow growth dynamics. The fact that the same global features were found on different compounds and in polycrystalline and single crystalline samples, suggests that the effect is a general feature of some phase separated media.

Original languageEnglish (US)
Pages (from-to)293-295
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume258-259
DOIs
StatePublished - Mar 1 2003
EventSecond Moscow International Symposium on Magnetism (MISM) - Moscow, Russian Federation
Duration: Jun 20 2001Jun 24 2001

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Keywords

  • Magnetoresistance
  • Manganites
  • Phase separation

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    Levy, P., Parisi, F., Sacanell, J., Granja, L., Quintero, M., Curiale, J., Polla, G., Leyva, G., Freitas, R. S., Ghivelder, L., Acha, C., Koo, T. Y., & Cheong, S-W. (2003). Persistent magnetoresistive memory in phase separated manganites. Journal of Magnetism and Magnetic Materials, 258-259, 293-295. https://doi.org/10.1016/S0304-8853(02)01140-X