https://doi.org/10.1140/epjb/e2010-00094-5
Memory effects in superparamagnetic La0.6Pb0.4MnO3 nanoparticles
1
Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, China
2
1.Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550, Stuttgart, Germany
3
Hefei National Laboratory for Physical Sciences at Microscale, and Department of Physics, University of Science and Technology of China, Anhui, Hefei, 230026, China
Corresponding author: zhangtao@issp.ac.cn
Received:
21
October
2009
Revised:
1
February
2010
Published online:
18
March
2010
Using different temperature and field protocols, the memory behaviors in the dc magnetization and magnetic relaxation are observed at temperature below blocking temperature TB = 93 K in weakly interacting manganite La0.6Pb0.4MnO3 nanoparticles. The results indicate that the magnetic dynamics of this nanoparticle system is strongly correlated with a wide distribution of particle relaxation times, which may arise from the particle weak interaction and distribution of the particle size.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2010
