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

On estimating the magnetocaloric effect from magnetization measurements

Amaral, JS; Amaral, VS
2010, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 322, 9-12, 1552-1557.

Prediction of realistic entropy behavior from mixed state magnetization data for first order phase transition materials

Das, S; Amaral, JS; Amaral, VS
2010, JOURNAL OF APPLIED PHYSICS, 107, 9.

Handling mixed-state magnetization data for magnetocaloric studies-a solution to achieve realistic entropy behaviour

Das, S; Amaral, JS; Amaral, VS
2010, JOURNAL OF PHYSICS D-APPLIED PHYSICS, 43, 15.

The effect of magnetic irreversibility on estimating the magnetocaloric effect from magnetization measurements

Amaral, JS; Amaral, VS
2009, APPLIED PHYSICS LETTERS, 94, 4.

High refrigerant capacity of PrNi5-xCox magnetic compounds exploiting its spin reorientation and magnetic transition over a wide temperature zone

Rocco, DL; Amaral, JS; Leitao, JV; Amaral, VS; Reis, MS; Das, S; Fernandes, RP; Araujo, JP; Pereira, AM; Tavares, PB; Martins, NV; Coelho, AA
2009, JOURNAL OF PHYSICS D-APPLIED PHYSICS, 42, 5.

Percolation processes and spin-reorientation of PrNi5-xCox

Rocco, DL; Amaral, JS; Leitao, JV; Amaral, VS; Reis, MS; Fernandes, RP; Pereira, AM; Araujo, JP; Martins, NV; Tavares, PB; Coelho, AA
2009, PHYSICAL REVIEW B, 79, 1.

Superferromagnetism in mechanically alloyed fcc Fe23Cu77 with bimodal cluster size distribution

Silva, NJO; Amaral, JS; Amaral, VS; Costa, BFO; Le Caer, G
2009, JOURNAL OF PHYSICS-CONDENSED MATTER, 21, 4.

The effect of chemical distribution on the magnetocaloric effect: A case study in second-order phase transition manganites

Amaral, JS; Tavares, PB; Reis, MS; Araujo, JP; Mendonca, TM; Amaral, VS; Vieira, JM
2008, JOURNAL OF NON-CRYSTALLINE SOLIDS, 354, 47-51, 5301-5303.

Influence of the Magnetic Anisotropy on the Magnetic Entropy Change of Ni2Mn(Ga, Bi) Memory Shape Alloy

Leitao, JCV; Rocco, DL; Amaral, JS; Reis, MD; Amaral, VBS; Fernandes, RP; Martins, NV; Tavares, PB
2008, IEEE TRANSACTIONS ON MAGNETICS, 44, 11, 3036-3039.

Phase Separation of La0.70-xErxSr0.30MnO3 and its Effect on Magnetic and Magnetocaloric Properties

Amaral, JS; Reis, MS; Araujo, JP; Mendonaca, TM; Tavares, PB; Amaral, VS; Vieira, JM
2008, ADVANCED MATERIALS FORUM IV, 587-588, 338-+.

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