The effect of magnetic order in amorphous LaSrMnO films on an anomaly in the variable range hopping

Anomalies of a variable range hopping (VRH) in amorphous LaSrMnO films containing ferromagnetic (FM) and antiferromagnetic (AFM) crystalline clusters are investigated. Anomalies are constituted, in the 190–130 K temperature interval, by an increase of the local activation energy ( ε a ) with decreas...

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Published inPhysics letters. A Vol. 373; no. 8; pp. 894 - 900
Main Authors Okunev, V.D., Samoilenko, Z.A., Pafomov, N.N., Plehov, A.L., Szymczak, R., Szymczak, H., Lewandowski, S.J.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 23.03.2009
Subjects
FM and AFM clusters
Magnetic ordering
Manganite films
Variable range hopping
FM and AFM clusters
Manganite films
73.50.Gr
Variable range hopping
Magnetic ordering
72.20.My
75.50.Pp
68.55.Jk
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ISSN0375-9601
1873-2429
DOI10.1016/j.physleta.2009.01.015

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Summary:Anomalies of a variable range hopping (VRH) in amorphous LaSrMnO films containing ferromagnetic (FM) and antiferromagnetic (AFM) crystalline clusters are investigated. Anomalies are constituted, in the 190–130 K temperature interval, by an increase of the local activation energy ( ε a ) with decreasing temperature. It is established that the increase in ε a is caused by magnetic ordering of AFM clusters containing Mn 3+ and Mn 4+ centers participating in VRH.
ISSN:0375-9601
1873-2429
DOI:10.1016/j.physleta.2009.01.015