Optical indication of metallic clusters in the layered manganites above

N. N. Loshkareva; E. V. Mostovshchikova; N. I. Solin; Yu. P. Sukhorukov; S. N. Tugushev; S. V. Naumov

doi:10.1209/epl/i2006-10345-8

All issues

Volume 76 / No 5 (December 2006)

Europhys. Lett., 76 5 (2006) 933-937

Abstract

Issue		Europhys. Lett. Volume 76, Number 5, December 2006


Page(s)		933 - 937
Section		Condensed matter: electronic structure, electrical, magnetic, and optical properties
DOI		https://doi.org/10.1209/epl/i2006-10345-8
Published online		01 November 2006

Europhys. Lett., 76 (5), pp. 933-937 (2006)

Optical indication of metallic clusters in the layered manganites $\chem{La_{2 - 2{\it x}}Sr_{1 + 2{\it x}}Mn_{2}O_{7}}$ above $\mth{T_\ab{C}}$

N. N. Loshkareva, E. V. Mostovshchikova, N. I. Solin, Yu. P. Sukhorukov, S. N. Tugushev and S. V. Naumov

The Institute of Metal Physics of UD of the Russian Academy of Sciences 620041, Ekaterinburg, S. Kovalevskoy str. 18, Russia

Received: 26 July 2006
Accepted: 3 October 2006

Abstract

Optical absorption in the bi-layered manganites $\chem{La_{2 - 2{\it x}}Sr_{1 + 2{\it x}}Mn_{2}O_{7}}$ ( $x=0.3$ and 0.4) was studied and metallic clusters were revealed in the temperature range $T_\ab{C}<T<270\un{K}$ in the composition with $x=0.4$ . The existence of metal clusters is considered as the principal cause of magnetoresistance, the tails of magnetization and ferromagnetic correlations, which are observed in this manganite up to temperatures several times exceeding the temperature $T_\ab{C}$ of 3D magnetic ordering.

PACS: 75.47.Lx – Manganites / 78.20.-e – Optical properties of bulk materials and thin films

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.