MAGNETIC RESONANT X-RAY DIFFRACTION APPLIED TO THE STUDY OF EuTe FILMS AND MULTILAYERS


Autoria(s): DIAZ, B.; ABRAMOF, E.; RAPPL, P. H. O.; GRANADO, E.; Chitta, Valmir Antonio; Henriques, Andre Bohomoletz; Oliveira Junior, Nei Fernandes de
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

20/10/2012

20/10/2012

2009

Resumo

In this work we use magnetic resonant x-ray diffraction to study the magnetic properties of a 1.5 mu m EuTe film and an EuTe/PbTe superlattice (SL). The samples were grown by molecular beam epitaxy on (111) oriented BaF(2) substrates. The measurements were made at the Eu L(2) absorption edge, taking profit of the resonant enhancement of more than two orders in the magnetically diffracted intensity. At resonance, high counting rates above 11000 cps were obtained for the 1.5 gm EuTe film, allowing to check for the type II antiferromagnetic order of EuTe. An equal population of the three possible in-plane magnetic domains was found. The EuTe/PbTe SL magnetic peak showed a satellite structure, indicating the presence of magnetic correlations among the 5 ML (monolayers) EuTe layers across the 15 ML PbTe non-magnetic spacers. The temperature dependence of the integrated intensities of the film and the SL yielded different Neel temperatures T(N). The lower T(N) for the SL is explained considering the higher influence of the surface atoms, with partial bonds lost.

Identificador

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, v.23, n.Dez/13, p.2979-2983, 2009

0217-9792

http://producao.usp.br/handle/BDPI/29399

http://apps.isiknowledge.com/InboundService.do?Func=Frame&product=WOS&action=retrieve&SrcApp=EndNote&UT=000266913000072&Init=Yes&SrcAuth=ResearchSoft&mode=FullRecord

Idioma(s)

eng

Publicador

WORLD SCIENTIFIC PUBL CO PTE LTD

Relação

International Journal of Modern Physics B

Direitos

restrictedAccess

Copyright WORLD SCIENTIFIC PUBL CO PTE LTD

Palavras-Chave #Magnetic resonant X-ray diffraction #europium telluride #superlattice #Physics, Applied #Physics, Condensed Matter #Physics, Mathematical
Tipo

article

proceedings paper

publishedVersion