Paper Title:
Oxygen Isotope Effect in Layered Manganites
  Abstract

The oxygen isotope effect in ceramic bilayer manganite (La1 zPrz)1.2Sr1.8Mn216 18O7 (z = 0, 0.3, 0.4, 0.6) 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 40 kOe. Substantial decrease of ferromagnetic (FM) transition temperature TFM under oxygen isotope substitution 16O → 18O was found. This positive isotope effect amounts to more than 20 K. A number of additional transitions of ferromagnetic type were observed at T >170 K, which also depend on oxygen overall mass. The obtained results are compared with those observed in other manganites exhibiting the large isotope effect.

  Info
Periodical
Solid State Phenomena (Volumes 152-153)
Edited by
N. Perov
Pages
116-119
DOI
10.4028/www.scientific.net/SSP.152-153.116
Citation
A.N. Taldenkov, N.A. Babushkina, A.V. Inyushkin, R. Suryanarayanan, "Oxygen Isotope Effect in Layered Manganites", Solid State Phenomena, Vols. 152-153, pp. 116-119, 2009
Online since
April 2009
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