Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Zimmer, Fábio Mallmann"'
Autor:
Romitti, Marcos Vinicios, Zimmer, Fábio Mallmann, Morais Junior, Carlos Alberto Vaz de, Magalhaes, Sergio Garcia
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
We study magnetic properties of spin glass (SG) systems under a random field (RF), based on the suggestion that RFs can be induced by a weak transverse field in the compound LiHo x Y 1 − x F 4 .Weconsideracluster spin model that allows long-range d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::69de8cb8e47776e13ece1a07088f6e0a
Autor:
Magalhaes, Sergio Garcia, Morais Junior, Carlos Alberto Vaz de, Zimmer, Fábio Mallmann, Lazo, Matheus Jatkoske, Nobre, Fernando Dantas
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
The interplay between quantum fluctuations and disorder is investigated in a quantum spin-glass model, in the presence of a uniform transverse field , as well as of a longitudinal random field hi , which follows a Gaussian distribution characterized
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::f183f66d925ddc4000c62b3b08984b2f
Autor:
Morais Junior, Carlos Alberto Vaz de, Zimmer, Fábio Mallmann, Lazo, Matheus Jatkoske, Magalhaes, Sergio Garcia, Nobre, Fernando Dantas
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
The behavior of the nonlinear susceptibility χ3 and its relation to the spin-glass transition temperature Tf in the presence of random fields are investigated. To accomplish this task, the Sherrington-Kirkpatrick model is studied through the replica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::093bd4c503743f20deece23015f4511f
Autor:
Zimmer, Fábio Mallmann
Publikováno v:
Biblioteca Digital de Teses e Dissertações do UFSM
Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq In the present work, a fermionic infinite-range Ising spin glass (SG) model with a transverse field Γ is studied. The model is analyzed in a one-lattice structure (qua
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::78eece91c3417d2ccb8faf1275f0ae0b
http://repositorio.ufsm.br/handle/1/23830
http://repositorio.ufsm.br/handle/1/23830
Publikováno v:
Biblioteca Digital de Teses e Dissertações do UFSM
Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
We study a model of localized spins which can assume three different states, S = 0 and 1, with two competing interactions: a antiferromagnetic first neighbour interaction (JA) and a three body interaction between third neighbours (JB), occurring only
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::444498c3f4b0d857bd295926fdfde2b9
http://repositorio.ufsm.br/handle/1/21143
http://repositorio.ufsm.br/handle/1/21143
Autor:
Kellermann, Nathan
Publikováno v:
Biblioteca Digital de Teses e Dissertações do UFSM
Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq In this work we study the effects of quantum fluctuations in a disordered magnetic system. We consider a cluster-spin Ising model with antiferromagnetic short range int
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::9dff9e20069b2aa2a1a0469712024855
http://repositorio.ufsm.br/handle/1/19156
http://repositorio.ufsm.br/handle/1/19156
Autor:
Romitti, Marcos Vinicios
Publikováno v:
Biblioteca Digital de Teses e Dissertações do UFSM
Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES This work investigates the effects of the presence of random magnetic fields (RFs) in thermodynamic quantities that characterize the spin glass state (VS). We adopt a cluster spi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::09c54061ff1508ec51c1c8f3634a7084
http://repositorio.ufsm.br/handle/1/17547
http://repositorio.ufsm.br/handle/1/17547
Autor:
Schmidt, Mateus
Publikováno v:
Biblioteca Digital de Teses e Dissertações do UFSM
Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq In magnetic systems, frustration - which refers to the inhability to satisfy all the interactios simultaneously - has ravealed a rich phenomenology. In particular, diso
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::f90ebc118c49b336f963c9b7767b57e2
http://repositorio.ufsm.br/handle/1/16501
http://repositorio.ufsm.br/handle/1/16501
Autor:
Schneider, Angélica Daiane
Publikováno v:
Biblioteca Digital de Teses e Dissertações do UFSM
Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq Niobium nitride (NbN) thin films can be hard and resistant not only to mechanical wear but also to chemically aggressive atmospheres. Additionally, they can present a s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::643fc269bced1bce660c35d577b29744
http://repositorio.ufsm.br/handle/1/13950
http://repositorio.ufsm.br/handle/1/13950
Autor:
Rossato, Veronica Venturini
Publikováno v:
Biblioteca Digital de Teses e Dissertações do UFSM
Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES Many factors may cause damages to the DNA, among them we can quote environmental pollution, ionizing radiations, amongst others. The signalization involved after an instituted da
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::8fd3ce840fce57113aaabff3a6b0a3ab
http://repositorio.ufsm.br/handle/1/16459
http://repositorio.ufsm.br/handle/1/16459