A1 Journal article (refereed), original research

Influence of the phase separation effect on low-field magnetic properties of La1-xBaxMnO3


Publication Details

Authors: Laiho R, Lisunov K G, Lähderanta Erkki, Zakhvalinskii V S, Kozhevnikov VL, Leonidov IA, Mitberg EB, Patrakeev MV

Publisher: Elsevier

Publication year: 2005

Language: English

Related journal or series: Journal of Magnetism and Magnetic Materials

Volume number: 293

Issue number: 3

Start page: 892

End page: 902

Number of pages: 11

ISSN: 0304-8853

eISSN: 1873-4766

JUFO level of this publication: 0

Digital Object Identifier (DOI): http://dx.doi.org/10.1016/j.jmmm.2004.12.021

Open Access: Not an Open Access publication


Abstract

Magnetic susceptibility, , is investigated in ceramic La Ba MnO (LBMO)
with in the range of fields and temperatures . All samples exhibit a
paramagnetic (PM) to ferromagnetic (FM) transition with increasing with
from 177 K ( ) to 295 K ( ) and magnetic irreversibility decreasing
below with increasing . In the PM phase an interval of the Curie–Weiss
behavior of with an effective Bohr magneton number, , is observed above .
Below and down to the susceptibility follows the scaling law with
corresponding to a three-dimensional (3D) Heisenberg spin system. Below ,
obeys the same scaling law as for , but with another value of ,
characteristic of a 3D percolation system. The temperature dependence of
the susceptibility observed in the PM phase is explained by small FM
particles embedded in the host LBMO matrix above . The size of these
particles increases between and up to nanometer scale, forming critical
percolation clusters below . The magnetic irreversibility is connected
to a mixed, FM and cluster-glass, phase.


Last updated on 2019-30-09 at 13:38