Zobrazeno 1 - 10
of 33
pro vyhledávání: '"T.S.T. Alvarenga"'
Autor:
J.C.G. Tedesco, A. Caldas, A.M.G. Carvalho, N.A. de Oliveira, E.P. Nóbrega, V.S.R. de Sousa, P.O. Ribeiro, B.P. Alho, P. H. O. Lopes, Adelino A. Coelho, P.J. von Ranke, T.S.T. Alvarenga
Publikováno v:
Journal of Magnetism and Magnetic Materials. 449:308-312
In this work, we report the magnetic and magnetocaloric properties of the Gd1−yPryNi2 compounds from both experimental and theoretical points of view. It is worth noting that this series shows a variety of magnetic arrangements depending on the Pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c74b1e5503760b81feca1ff3c2a37c5
https://doi.org/10.1016/j.jmmm.2017.10.044
https://doi.org/10.1016/j.jmmm.2017.10.044
Autor:
B.P. Alho, P.O. Ribeiro, A. Magnus G. Carvalho, E.P. Nóbrega, A. Caldas, P. H. O. Lopes, V.S.R. de Sousa, P.J. von Ranke, T.S.T. Alvarenga
Publikováno v:
Journal of Magnetism and Magnetic Materials. 442:265-269
We report the anisotropy of magnetic field-induced entropy change in rare earth Er 1 - y Tb y Al 2 compounds (y = 0.00, 0.25, 0.50, 0.75 and 1.00). In the present work, we use a model Hamiltonian that includes the crystalline electrical field anisotr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1dbf0ba81961b3fc80504726dc45280
https://doi.org/10.1016/j.jmmm.2017.06.120
https://doi.org/10.1016/j.jmmm.2017.06.120
Autor:
P.O. Ribeiro, E.P. Nóbrega, V.S.R. de Sousa, B.P. Alho, T.S.T. Alvarenga, A. Caldas, P.J. von Ranke
Publikováno v:
Journal of Magnetism and Magnetic Materials. 441:271-275
Interesting behaviors in the magnetocaloric effect and magnetoresistivity are predicted for cubic CsCl-type TmZn compound in which, recently, the giant magnetocaloric effect was reported. Our model includes the crystalline electrical field, exchange,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::547e76081f2f8790e55f3613d0bd7005
https://doi.org/10.1016/j.jmmm.2017.05.078
https://doi.org/10.1016/j.jmmm.2017.05.078
Publikováno v:
Intermetallics. 87:90-93
In this paper, we investigated some magnetic and magnetocaloric properties in the amorphous series R E N i 3 ( R E = D y , H o , E r ). The magnetic and magnetocaloric description of these compounds were performed using a Hamiltonian that includes th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::13efe3358008c3ba21fb2e62e7dcf12e
https://doi.org/10.1016/j.intermet.2017.04.012
https://doi.org/10.1016/j.intermet.2017.04.012
Autor:
P.O. Ribeiro, E.P. Nóbrega, P.J. von Ranke, T.S.T. Alvarenga, B.P. Alho, Stefano Costa, A. Caldas, V.S.R. de Sousa, N.A. de Oliveira
Publikováno v:
Journal of Magnetism and Magnetic Materials. 422:157-160
We report a theoretical model formed by two coupled magnetic sublattices of localized spins in the presence of an applied magnetic field to investigate the magnetic characteristics and magnetocaloric properties of amorphous yttrium iron garnet. The m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::febd59745f7fd828c01381decb531fdf
https://doi.org/10.1016/j.jmmm.2016.08.086
https://doi.org/10.1016/j.jmmm.2016.08.086
Autor:
T.S.T. Alvarenga, B.P. Alho, A. Magnus G. Carvalho, N.A. de Oliveira, P.J. von Ranke, E.P. Nóbrega, V.S.R. de Sousa, P.O. Ribeiro, A. Caldas
Publikováno v:
Journal of Magnetism and Magnetic Materials. 379:112-116
We report on the magnetic and magnetocaloric effect calculations in rare earth Er 1− y Tb y Al 2 compounds ( y =0.00, 0.25, 0.5, 0.75 and 1.00). Our model Hamiltonian has contributions of the crystalline electrical field anisotropy in both Er and T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f3954e7cc89b531f8e06a72c9832bd5a
https://doi.org/10.1016/j.jmmm.2014.12.023
https://doi.org/10.1016/j.jmmm.2014.12.023
Autor:
V.S.R. de Sousa, A. Magnus G. Carvalho, N.A. de Oliveira, P. H. O. Lopes, P.J. von Ranke, T.S.T. Alvarenga, E.P. Nóbrega, P.O. Ribeiro, A. Caldas, B.P. Alho
Publikováno v:
Journal of Magnetism and Magnetic Materials. 369:34-39
We report theoretical investigations on the magnetic entropy changes in amorphous systems through two different assumptions. In the first assumption, the HPZ-anisotropic model is considered to deal with the random direction of magnetic moments, where
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::81d5ba937a6d95a4d4c9d567928b739a
https://doi.org/10.1016/j.jmmm.2014.06.026
https://doi.org/10.1016/j.jmmm.2014.06.026
Publikováno v:
International Journal of Refrigeration. 37:297-302
In this work we calculate the magnetic properties and the magnetocaloric effect in Gd1−yDyyAl2 (y = 0, 0.25, 0.5, 0.75 and 1). The model Hamiltonian includes contributions from the Zeeman effect, the crystalline electrical field anisotropy and the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::253cef704d0b41499fb04fcbe9b6171e
https://doi.org/10.1016/j.ijrefrig.2013.07.012
https://doi.org/10.1016/j.ijrefrig.2013.07.012
Autor:
T.S.T. Alvarenga, P.O. Ribeiro, V.S.R. de Sousa, P.J. von Ranke, A. Magnus G. Carvalho, B.P. Alho, N.A. de Oliveira, A. Caldas, E.P. Nóbrega
Publikováno v:
Journal of Magnetism and Magnetic Materials. 341:138-141
One of the biggest challenges in materials science is to understand the microscopic mechanisms responsible in storage and release material entropy. TbN compound, which presents non-degeneracy in ground state, was studied and the calculated magnetocal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2db7ddeed2c7fb723fe31f6b04538a4
https://doi.org/10.1016/j.jmmm.2013.04.035
https://doi.org/10.1016/j.jmmm.2013.04.035
Autor:
B.P. Alho, V.S.R. de Sousa, E.P. Nóbrega, A. Caldas, P.O. Ribeiro, T.S.T. Alvarenga, A.Magnus G. Carvalho, P.J. von Ranke, N.A. de Oliveira
Publikováno v:
Journal of Alloys and Compounds. 563:242-248
We report the calculations on the magnetocaloric and barocaloric effects in ferromagnetic series TbyGd(1−y)Al2. Our model includes the crystalline electrical field interaction, exchange interactions among Tb–Tb, Gd–Gd and Tb–Gd magnetic ions
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe51b4101f67f78ee7be75216f358fdf
https://doi.org/10.1016/j.jallcom.2013.02.068
https://doi.org/10.1016/j.jallcom.2013.02.068