Oxygen Isotope Effect in Ordered PrBaMn₂O₆

Abstract:

The oxygen isotope effect in ordered half-doped manganite PrBaMn₂^16-18O₆ has been investigated. Real and imaginary parts of ac magnetic susceptibility, dc magnetization and magnetoresistance were measured at temperatures from 4.2 to 320 K in applied magnetic field up to 35 kOe. Substantial increase of charge ordering (CO) transition temperature T_CO under oxygen isotope substitution ¹⁶O ¹⁸O and small decrease of ferromagnetic (FM) transition temperature T_FM were found. Small systematic shift of ferromagnetic transition temperature in oxygen reduced manganite PrBaMn₂^{16 18}O₅ is also considered. The obtained results are compared with those observed in other manganites demonstrating the large isotope effect.

• Periodical: Solid State Phenomena (Volume 190)
• Pages: 699-702
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.190.699
• Online since: June 2012
• Authors: A.N. Taldenkov, N.A. Babushkina, A.V. Inyushkin, V.S. Kalitka, A.R. Kaul
• Keywords: Isotope Effect, Magnetic Oxides, Manganite

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