Výsledky vyhledávání - "Interações de troca (elétron)"

Engineering double-shifted hysteresis loops in Co/IrMn/Cu/Co films

Autor: Thiago Dias, Cyrile Deranlot, Rafael Cichelero, Julian Penkov Geshev, Frédéric Petroff, Joao Edgar Schmidt, Luis Gustavo Pereira

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

Co(3 nm)/IrMn(15 nm)/Cu(dCu)/Co(7 nm) films were subjected to magnetic annealing where its temperature and duration as well as the direction and amplitude of the applied field were varied. We demonstrate that the exchange-bias field magnitude and sig

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f10e3baa591b5eb919dbbc6dc8efaec8

Zobrazit plný text záznamu

Dissertation/ Thesis

Exchange Bias em filmes de IrMn/Cu/Co

Autor: Nicolodi, Sabrina

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

Medidas de magnetização (MAG) e de ressonância ferromagnética (FMR) foram usadas para estudar a interação de troca entre a camada antiferromagnética (AFM) de IrMn e a ferromagnética (FM) de Co no sistema IrMn/Cu/Co em função da espessura do

Externí odkaz: http://hdl.handle.net/10183/10353

Zobrazit plný text záznamu

Ising nematic phase in ultra-thin magnetic films: a Monte Carlo study

Autor: Daniel A. Stariolo, Francisco A. Tamarit, Sergio A. Cannas, Mateus Fontana Michelon

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

We study the critical properties of a two--dimensional Ising model with competing ferromagnetic exchange and dipolar interactions, which models an ultra-thin magnetic film with high out--of--plane anisotropy in the monolayer limit. We present numeric

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7aa1633f9e7421999a694034bbee3ff3

Zobrazit plný text záznamu

Comment on 'Thickness dependence of exchange bias and coercivity in a ferromagnetic layer coupled with an antiferromagnetic layer' [J.Appl.Phys. 94, 2529 (2003)]

Autor: Geshev, Julian Penkov, Pereira, Luis Gustavo, Schmidt, Joao Edgar

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

Hu, Jin, and Ma have proposed a theoretical investigation on the influence of the antiferromagnetic layer thickness on the magnetic properties of ferromagnetic/ antiferromagnetic bilayers [J. Appl. Phys. 94, 2529 (2003)], considering both the bilinea

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3056::3c51b0641efe13c3066cc7ffc72cc10b

Zobrazit plný text záznamu

Intralayer coupling in self-organized Fe nanoclusters grown on vicinal Si(111)

Autor: M. Cougo dos Santos, Maria do Carmo Martins Alves, Philippe Allongue, Julian Penkov Geshev, Luis Gustavo Pereira, Joao Edgar Schmidt

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

This paper reports on the magnetic properties of Fe thin film grown on vicinal Si(111). The surface analysis, performed via scanning tunneling microscopy, showed that the iron grows in a form of two distinct types of elongated nanosized grains, align

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::38fe855706b81d3aaa126090332506d9

Zobrazit plný text záznamu

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

Zobrazit plný text záznamu

Band-filling effects on Kondo-lattice properties

Autor: Jose Iglesias, B. Coqblin, Claudine Lacroix, Miguel Angelo Cavalheiro Gusmao

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

We present theoretical results for a Kondo-lattice model with spin-1/2 localized moments, including both the intrasite Kondo coupling and an intersite antiferromagnetic exchange interaction, treated within an extended mean-field approximation. We des

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::02cd69f8d8b976d934829d4b531b7fc4

Zobrazit plný text záznamu

Rotatable anisotropy and coercivity in exchange-bias bilayers

Autor: Joao Edgar Schmidt, Luis Gustavo Pereira, Julian Penkov Geshev

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

A phenomenological approach for polycrystalline exchange-bias bilayers is proposed which explains the coercivity enhancement as well as its temperature and coupling strength dependences. In the model, it is assumed that uncompensated interfacial anti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d7937c01d4597262cc8dd2f7ae8481a
https://doi.org/10.1103/physrevb.66.134432

Zobrazit plný text záznamu

Angular dependence of the exchange bias obtained from magnetization and ferromagnetic resonance measurements in exchange-coupled bilayers

Autor: Luis Gustavo Pereira, Joao Edgar Schmidt, Julian Penkov Geshev

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

Theoretical calculations of the angular dependence of the exchange bias field in ferromagnetic/ antiferromagnetic bilayers were carried out in the framework of a model assuming the formation of a planar domain wall at the antiferromagnetic side of th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ad44f97d3aae675f41894452b42353a
https://doi.org/10.1103/physrevb.64.184411

Zobrazit plný text záznamu

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

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání