Search

Your search keyword '"Morellón, Luis"' showing total 3 results
Start Over Author "Morellón, Luis" Journal physica status solidi (b)
3 results on '"Morellón, Luis"'

1. On the nature of the (de)coupling of the magnetostructural transition in Er5 Si4

Author

Costa, Rui M., primary, Belo, João H., additional, Barbosa, Marcelo B., additional, Algarabel, Pedro A., additional, Magén, César, additional, Morellón, Luis, additional, Ibarra, Manuel R., additional, Gonçalves, João N., additional, Fortunato, Nuno M., additional, Amaral, João S., additional, Araújo, João P., additional, and Pereira, André M., additional

Published
2017
Full Text
View/download PDF

2. On the nature of the (de)coupling of the magnetostructural transition in Er5Si4.

Author

Costa, Rui M., Belo, João H., Barbosa, Marcelo B., Algarabel, Pedro A., Magén, César, Morellón, Luis, Ibarra, Manuel R., Gonçalves, João N., Fortunato, Nuno M., Amaral, João S., Araújo, João P., and Pereira, André M.

Subjects
DENSITY functional theory, FREE energy (Thermodynamics), MAGNETOCALORIC effects, PHASE transitions, X-ray diffraction
Abstract

In this report, a successful thermodynamical model was employed to understand the structural transition in Er5Si4, able to explain the decoupling of the magnetic and structural transition. This was achieved by DFT calculations, which were used to determine the energy differences at 0 K, using a LSDA+U approximation. It was found that the M structure is the stable phase at low temperatures, as verified experimentally with a value of ΔF0=-0.262 eV. Finally, a variation of Seebeck coefficient (~6 μV) was determined at the structural transition, which allows to conclude that the electronic entropy variation is negligible in the transition. [ABSTRACT FROM AUTHOR]

Published
2017
Full Text
View/download PDF

3. On the nature of the (de)coupling of the magnetostructural transition in Er5Si4.

Author

Costa, Rui M., Belo, João H., Barbosa, Marcelo B., Algarabel, Pedro A., Magén, César, Morellón, Luis, Ibarra, Manuel R., Gonçalves, João N., Fortunato, Nuno M., Amaral, João S., Araújo, João P., and Pereira, André M.

Subjects
*DENSITY functional theory, *FREE energy (Thermodynamics), *MAGNETOCALORIC effects, *PHASE transitions, *X-ray diffraction
Abstract

In this report, a successful thermodynamical model was employed to understand the structural transition in Er5Si4, able to explain the decoupling of the magnetic and structural transition. This was achieved by DFT calculations, which were used to determine the energy differences at 0 K, using a LSDA+U approximation. It was found that the M structure is the stable phase at low temperatures, as verified experimentally with a value of ΔF0=-0.262 eV. Finally, a variation of Seebeck coefficient (~6 μV) was determined at the structural transition, which allows to conclude that the electronic entropy variation is negligible in the transition. [ABSTRACT FROM AUTHOR]

Published
2017
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results