Preparation and characterization of FeAg granular alloys

Detalhes bibliográficos
Autor(a) principal: Soares,J. M.
Data de Publicação: 2004
Outros Autores: Araújo,J. H. de, Cabral,F. A. O., Costa,J. A. P. da, Sasaki,J. M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000300022
Resumo: Fe10Ag90 granular alloys have been fabricated, using a sol-gel method, for a range of nitric acid concentrations in the start solution. The samples have been characterized by X-ray diffraction and magnetization measurements. The average Fe particle sizes derived from X-ray diffraction are in the range 24-29 nm, indicating a large variation. The coercivity obtained from the hysteresis curve is two orders of magnitude larger that of pure iron in all the samples. Moreover, the hysteresis curves do not saturate, even in fields of up to 1 T. These observations indicate that the samples contain both superparamagnetic and blocked particles. A comparison between the coercive field and the average particle diameter, determined by the Sherrer's formula, is displayed in all acid concentrations.
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spelling Preparation and characterization of FeAg granular alloyssol-gelgranular alloyferromagnetismFe10Ag90 granular alloys have been fabricated, using a sol-gel method, for a range of nitric acid concentrations in the start solution. The samples have been characterized by X-ray diffraction and magnetization measurements. The average Fe particle sizes derived from X-ray diffraction are in the range 24-29 nm, indicating a large variation. The coercivity obtained from the hysteresis curve is two orders of magnitude larger that of pure iron in all the samples. Moreover, the hysteresis curves do not saturate, even in fields of up to 1 T. These observations indicate that the samples contain both superparamagnetic and blocked particles. A comparison between the coercive field and the average particle diameter, determined by the Sherrer's formula, is displayed in all acid concentrations.ABM, ABC, ABPol2004-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000300022Materials Research v.7 n.3 2004reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392004000300022info:eu-repo/semantics/openAccessSoares,J. M.Araújo,J. H. deCabral,F. A. O.Costa,J. A. P. daSasaki,J. M.eng2004-08-13T00:00:00Zoai:scielo:S1516-14392004000300022Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2004-08-13T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Preparation and characterization of FeAg granular alloys
title Preparation and characterization of FeAg granular alloys
spellingShingle Preparation and characterization of FeAg granular alloys
Soares,J. M.
sol-gel
granular alloy
ferromagnetism
title_short Preparation and characterization of FeAg granular alloys
title_full Preparation and characterization of FeAg granular alloys
title_fullStr Preparation and characterization of FeAg granular alloys
title_full_unstemmed Preparation and characterization of FeAg granular alloys
title_sort Preparation and characterization of FeAg granular alloys
author Soares,J. M.
author_facet Soares,J. M.
Araújo,J. H. de
Cabral,F. A. O.
Costa,J. A. P. da
Sasaki,J. M.
author_role author
author2 Araújo,J. H. de
Cabral,F. A. O.
Costa,J. A. P. da
Sasaki,J. M.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Soares,J. M.
Araújo,J. H. de
Cabral,F. A. O.
Costa,J. A. P. da
Sasaki,J. M.
dc.subject.por.fl_str_mv sol-gel
granular alloy
ferromagnetism
topic sol-gel
granular alloy
ferromagnetism
description Fe10Ag90 granular alloys have been fabricated, using a sol-gel method, for a range of nitric acid concentrations in the start solution. The samples have been characterized by X-ray diffraction and magnetization measurements. The average Fe particle sizes derived from X-ray diffraction are in the range 24-29 nm, indicating a large variation. The coercivity obtained from the hysteresis curve is two orders of magnitude larger that of pure iron in all the samples. Moreover, the hysteresis curves do not saturate, even in fields of up to 1 T. These observations indicate that the samples contain both superparamagnetic and blocked particles. A comparison between the coercive field and the average particle diameter, determined by the Sherrer's formula, is displayed in all acid concentrations.
publishDate 2004
dc.date.none.fl_str_mv 2004-09-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000300022
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000300022
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392004000300022
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.7 n.3 2004
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
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