Zobrazeno 1 - 10
of 40
pro vyhledávání: '"R.J. Caraballo Vivas"'
Akademický článek
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Autor:
N.R. Checca, Mario S. Reis, Wilmar S. Torres, D.L. Rocco, M. A. V. Heringer, André L. Rossi, R.J. Caraballo-Vivas, D.R. Sanchez
Publikováno v:
Journal of Alloys and Compounds. 803:417-423
Bulk La(Fe,Si)13 materials received much attention because of their increasing magnetocaloric potential, low cost and T c tunable by Co or H substitution. However, the properties of these materials in nanometric dimensions have been investigated by f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b616dc2c5df0bdeed48fda855d17fd87
https://doi.org/10.1016/j.jallcom.2019.06.238
https://doi.org/10.1016/j.jallcom.2019.06.238
Publikováno v:
Journal of Alloys and Compounds. 796:331-337
LaCoO3 suffers spin crossover as a function of temperature, changing from low-spin state to intermediate-state and, at high temperatures, it also changes to a high-spin state. Nano-confinement of this material induces a long-range magnetic ordering,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50cd368a86eb04a5ebaf140e16dc569e
https://doi.org/10.1016/j.jallcom.2019.04.282
https://doi.org/10.1016/j.jallcom.2019.04.282
Autor:
Nuno M. Fortunato, Mario S. Reis, R.J. Caraballo-Vivas, N.R. Checca, Farzin Mohseni, D.L. Rocco, João S. Amaral, Adelino A. Coelho, J. N. Gonçalves, André L. Rossi
Publikováno v:
Materials & Design, Vol 143, Iss, Pp 268-273 (2018)
Full Heusler alloys are well known to either crystallize in a cubic structure (Cu2MnAl-type), or present tetragonal distortions. Both structure types present interesting properties, like room temperature magnetic memory shape effect and/or remarkable
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d94d3d5af38c18d4a8419bc07be61c39
http://www.sciencedirect.com/science/article/pii/S0264127518300765
http://www.sciencedirect.com/science/article/pii/S0264127518300765
Autor:
A.M. Tishin, Mario S. Reis, Vladimir I. Zverev, N.R. Checca, L.A. Makarova, B. Pimentel, R.T. Salakhova, R.J. Caraballo-Vivas, Alexander A. Shtil, Alexander P. Pyatakov, André L. Rossi, N. S. Perov
Publikováno v:
Journal of Solid State Chemistry. 260:34-38
La0.75Sr0.25MnO3 nanoparticles with average diameter close to 20.9 nm were synthesized using a sol-gel method. Measurements showed that the heating process stops at the blocking temperaturesignificantly below the Curie temperature. Measurements of Sp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::854ccf8ceef486f240f0d33af06149da
https://doi.org/10.1016/j.jssc.2018.01.001
https://doi.org/10.1016/j.jssc.2018.01.001
Autor:
B. Pimentel, Mario S. Reis, R.J. Caraballo Vivas, A.M. Tishin, Vladimir I. Zverev, N. S. Perov, Alexander P. Pyatakov, L.A. Makarova, R.T. Salakhova, Alexander A. Shtil
Publikováno v:
Journal of Magnetism and Magnetic Materials. 470:38-40
The study addresses the role of frequency of the AC magnetic field on heating of La0.75Sr0.25MnO3 nanoparticles. We observe (i) a superlinear dependence of specific absorption rate as a function of frequency at the body temperature and (ii) the prese
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::267138876ee50b585dde67ea6654795e
https://doi.org/10.1016/j.jmmm.2017.11.126
https://doi.org/10.1016/j.jmmm.2017.11.126
Akademický článek
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Publikováno v:
Materials Chemistry and Physics. 196:103-108
We report on a systematic study of the experimental parameters to control size and morphology of half-metals Heusler nanoparticles synthesized by pulsed laser deposition (PLD) technique. Our findings suggest the existence of a threshold across which
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b2d04f31d1bb02832d70d0159c481d6
https://doi.org/10.1016/j.matchemphys.2017.04.037
https://doi.org/10.1016/j.matchemphys.2017.04.037
Tunable magnetocaloric effect around room temperature by Fe doping in Mn0.98Cr(0.02-x)FexAs compound
Autor:
P.O. Ribeiro, P.J. von Ranke, Victorino Franco, R.J. Caraballo Vivas, D.L. Rocco, A. M. G. Carvalho, Jhon J. Ipus, Adelino A. Coelho
Publikováno v:
Journal of Magnetism and Magnetic Materials. 436:85-90
In this work, we present an investigation of the magnetic and magnetocaloric properties of Mn 0.98 Cr ( 0.02 - x ) Fe x As compounds with x = 0.002, 0.005 and 0.010. Our findings show that as Fe content increases the unit cell volume decreases, which
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d93d8c931ab49ee1b9b21d2170e620bf
https://doi.org/10.1016/j.jmmm.2017.04.030
https://doi.org/10.1016/j.jmmm.2017.04.030
Autor:
R.J. Caraballo Vivas, A. M. dos Santos, D.L. Rocco, B. Pimentel, Mario S. Reis, L. Paixão, N.R. Checca, R. Torrão
Publikováno v:
Journal of Magnetism and Magnetic Materials. 422:197-203
Cobaltites show intriguing magnetic and transport properties, when compared with manganites for instance, as they exhibit an additional degree of freedom: the spin state of the Co ions. For Nd 0.5 Sr 0.5 CoO 3 this spin configuration is not well-esta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e1562a6ae3449c4589a89b443b6c1ad
https://doi.org/10.1016/j.jmmm.2016.08.080
https://doi.org/10.1016/j.jmmm.2016.08.080