Influence of annealing on magnesioferrite nanoparticles synthesized by a sol-gel/combustion method

Autor: João Batista Marimon da Cunha, Lúcia Helena Guimarães Cardoso, José Brant de Campos, Dalber Ruben Sanchez, Ronaldo Sergio de Biasi

Publikováno v: Materials Research, Vol 12, Iss 2, Pp 225-227 (2009)
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Materials Research v.12 n.2 2009
Materials research (São Carlos. Online)
Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
Materials Research, Volume: 12, Issue: 2, Pages: 225-227, Published: JUN 2009

Nanocrystalline particles of magnesioferrite (MgFe2O4) were prepared by a sol-gel/combustion method using iron nitrate, Fe(NO3)3.9H2O, magnesium nitrate, Mg(NO3)2.6H2O, and citric acid, C6H8O7.H2 O, and annealed for 2 hours at 400, 500 and 600 °C. T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17a13031ee9aab1a47c6b7b1fd319e3e
https://doi.org/10.1590/s1516-14392009000200018

Estudo do Exchange Bias em filmes de IrMn/Al2O3/Co e IrMn/Cr/Co

Autor: Nicolodi, Sabrina

Publikováno v: Biblioteca Digital de Teses e Dissertações da UFRGSUniversidade Federal do Rio Grande do SulUFRGS.

Neste trabalho estudamos a interação de troca entre a camada antiferromagnética (AFM) de IrMn, e a ferromagnética (FM) de Co, no sistema IrMn/Co através de uma camada espaçadora. Usamos dois materiais com propriedades distintas como espaçador,

Externí odkaz: http://hdl.handle.net/10183/30991

Frequency-dependent exchange bias in NiFe/NiO films

Autor: Luis Gustavo Pereira, Julian Penkov Geshev, F. Pelegrini, Joao Edgar Schmidt, E.B. Saitovitch, Luiz Carlos Camargo Miranda Nagamine

Publikováno v: Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS

Ferromagnetic (FM) resonance and magnetization curve measurements were performed at room temperature for a polycrystalline ${\mathrm{Ni}}_{81}{\mathrm{Fe}}_{19}$ coupled to NiO. It was observed that the shape of the angular variation of the resonance

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64e150e0c18929925a3b3a78712ef550
https://doi.org/10.1103/physrevb.67.132401

Analytical solutions for exchange bias and coercivity in ferromagnetic/antiferromagnetic bilayers

Autor: Julian Penkov Geshev

Publikováno v: Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS

Analytical expressions have been derived for the exchange bias field, coercivity, and effective anisotropy field in ferromagnetic/antiferromagnetic bilayers in the framework of a model assuming the formation of a planar domain wall at the antiferroma

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4adbd1a98220dc2d56e4847df586b98

Ferromagnetic resonance in ag coupled ni films

Autor: Rezende, Sergio Machado, Moura, J.A.S., Aguiar, F.M. de, Santos, Carlos Alberto dos, Schreiner, Wido Herwig, Teixeira, Sergio Ribeiro

Publikováno v: Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS

We present an X-band ferromagnetic resonance (FMR) study of polycrystalline single Ni films and of two Ni layers separated by an Ag layer at room temperature. Films were deposited by sputtering on glass using Ag over- and underlays. The single Ni fil

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3056::5ba034d4541f482a5af0949f41e725bc