João Cunha de Sequeira Amaral

Investigador Auxiliar

Perfil biográfico

João Amaral was awarded his PhD. in Physics in 2009 at the University of Aveiro (UA), and currently holds a permanent position as Assistant Researcher at the Associated Laboratory CICECO at UA. He has dedicated most of his scientific career to the to the study of magnetism and magnetic materials, with particular focus in energy applications. He is co-author of over 100 scopus-indexed peer-reviewed scientific publications, with over 2000 citations and an h-index of 24. He was the invited Editor of Special Issues in AIP Advances (American Institute of Physics), Frontiers in Energy Research (Frontiers) and Journal of Magnetism and Magnetic Materials (Elsevier).

He was the main supervisor of two PhD. students (finished 2020 and 2021), and is currently the main supervisor of three PhD. students (two with FCT funding) and the co-supervisor of another. He has coordinated competitive funded projects, including two FCT Exploratory Research Projects, an FCT-DAAD bi-lateral project with partner TU Darmstadt Germany, the local PI of an FCT IC&DT project, a national advanced computational research project, an EuroHPC computational project (850k CPU hours), was one of the seven research line coordinators of the 18M€ Bosch Thermotechnology - University of Aveiro Smart Green Homes Project and is the local PI of the recently approved EIC Pathfinder project MAGCCINE on magnetic refrigeration for vaccines.

He was an invited researcher at the EXSS group at Imperial College London from 2013-2015, collaborating with multiple national and international research groups throughout his career, while prioritizing the mobility and internationalization of his research team. He is currently the coordinator of CICECO Group 2: Photonic, Electronic and Magnetic Materials.

Projectos financiados

Principal Investigator of the FCT Exploratory Research Project "Exploring nano-fabrication methods of high coercivity rare-earth free Si-Alnico permanent magnets" (EXPL/CTM-NAN/1614/2013) [more info at the FCT web page]

Task leader of the FCT SR&TD Project of consolidation of research skills and resources "Facing the challenges of characterizing novel thermal materials and processes (Heat@UA)" (RECI/CTM-CER/0336/2012).

Publicações seleccionadas

"Magnetovolume Effects in Heusler Compounds via First-Principles Calculations", J. N. Gonçalves, J. S. Amaral and V. S. Amaral, IEEE Trans. Magn. 50 1301104 (2014) [DOI].

"Thermodynamics of the 2D Ising model from a random path sampling method", J. S. Amaral, J. N. Gonçalves and V. S. Amaral, IEEE Trans. Magn. 50 1002204 (2014) [DOI].

"Disorder effects in giant magnetocaloric materials", J. S. Amaral and V. S. Amaral; Phys. Stat. Sol. A 211 971 (2014) [DOI].

"Strain induced enhanced ferromagnetic behavior in inhomogeneous low doped La0.95Sr0.05MnO3+delta", S. Das, J. S. Amaral, et al.; Appl. Phys. Lett. 102 112408 (2013) [DOI].

"On the Curie temperature dependency of the Magnetocaloric effect", J. H. Belo, J. S. Amaral, et al.; Appl. Phys. Lett. 100 242407 (2012) [DOI].

"Handling mixed-state magnetization data for magnetocaloric studies - a solution to achieve realistic entropy behaviour", S. Das, J. S. Amaral, V. S. Amaral; J. Phys. D Appl. Phys. 43 152002 (2010) [DOI].

"On estimating the magnetocaloric effect from magnetization measurements", J. S. Amaral, V. S. Amaral; J. Magn. Magn. Mat. 322 1552 (2009) [DOI].

"The effect of magnetic irreversibility on estimating the magnetocaloric effect from magnetization measurements", J. S. Amaral, V. S. Amaral; Appl. Phys. Lett. 94 042506 (2009) [DOI].

"The effect of chemical distribution on the magnetocaloric effect: A case study in second-order phase transition manganites", J. S. Amaral, P. B. Tavares, et al., Journal of Non-Crystalline Solids 354 (47-51), 5301-5303 (2008) [DOI].

"A mean-field scaling method for first- and second-order phase transition ferromagnets and its application in magnetocaloric studies", J. S. Amaral, N. J. O. Silva, V. S. Amaral; Appl. Phys. Lett. 91, 172503 (2007) [DOI].

"Magnetocaloric effect in Er and Eu-substituted ferromagnetic La-Sr Manganites", J. S. Amaral, M. S. Reis, et al.; J. Magn. Magn. Mat. 290 686 (2005) [DOI].

Supervisões em Curso

Projectos

Publicações

Characterization of electrodeposited Ni and Ni80Fe20 nanowires

Leitao, DC; Sousa, CT; Ventura, J; Amaral, JS; Carpinteiro, F; Pirota, KR; Vazquez, M; Sousa, JB; Araujo, JP
2008, JOURNAL OF NON-CRYSTALLINE SOLIDS, 354, 47-51, 5241-5243.

Studies of local fields in the Pr1-xCaxMnO3 system using perturbed angular correlation spectroscopy

Lopes, AML; Araujo, JP; Mendonca, TM; Amaral, JS; Pereira, AM; Tavares, PB; Amaral, VS; Correia, JG
2008, JOURNAL OF NON-CRYSTALLINE SOLIDS, 354, 47-51, 5315-5317.

A mean-field scaling method for first- and second-order phase transition ferromagnets and its application in magnetocaloric studies

Amaral, JS; Silva, NJO; Amaral, VS
2007, APPLIED PHYSICS LETTERS, 91, 17.

Processing and phase separation of LSMO-based multiferroic composite ceramics

Song, GB; Amaral, JS; Amaral, VS; Kholkin, AL
2007, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 27, 13-15, 3941-3945.

Tuning of magnetocaloric effect in ferromagnetic La-Sr manganites through Er and Eu doping

Amaral, JS; Reis, MS; Amaral, VS; Mendonca, TM; Araujo, JP; Tavares, PB; Vieira, JM
2006, ADVANCED MATERIALS FORUM III, PTS 1 AND 2, 514-516, 299-303.

Magnetocaloric effect in Er- and Eu-substituted ferromagnetic La-Sr manganites

Amaral, JS; Reis, MS; Amaral, VS; Mendonca, TM; Araujo, JP; Sa, MA; Tavares, PB; Vieira, JM
2005, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 290, 686-689.

Charge-ordering contribution to the magnetic entropy change of (Pr, Ca)MnO3 manganites

Reis, MS; Gomes, AM; Araujo, JP; Amaral, JS; Tavares, PB; Oliveira, IS; Amaral, VS
2005, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 290, 697-699.

Magnetoelastic coupling influence on the magnetocaloric effect in ferromagnetic materials

Amaral, VS; Amaral, JS
2004, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 272, 2104-2105.

Magnetocaloric effect in manganites: Ferromagnetism and charge-ordering effects

Reis, MS; Gomes, AM; Araujo, JP; Tavares, PB; Amaral, JS; Oliveira, IS; Amaral, VS
2004, ADVANCED MATERIALS FORUM II, 455-456, 148-152.
ISBN: 0-87849-941-5

Charge-ordering and magnetoelastic coupling effects on the magnetocaloric properties of manganites

Reis, MS; Gomes, AM; Araujo, JP; Tavares, PB; Amaral, JS; Oliveira, IS; Amaral, VS
2004, ACTA PHYSICA POLONICA A, 105, 1-2, 163-171.

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