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

Rotating magnetocaloric effect in polycrystals-harnessing the demagnetizing effect

Almeida, R; Freitas, SC; Fernandes, CR; Kiefe, R; Araújo, JP; Amaral, JS; Ventura, JO; Belo, JH; Silva, DJ
2024, JOURNAL OF PHYSICS-ENERGY, 6, 1.

Exploring the Luminescence, Redox, and Magnetic Properties in a Multivariate Metal-Organic Radical Framework

Valente, G; Ferreira, P; Hernández-Rodríguez, MA; Brites, CDS; Amaral, JS; Zelenovskii, P; Paz, FAA; Guieu, S; Rocha, J; Souto, M
2024, CHEMISTRY OF MATERIALS, 36, 3, 1333-1341.
ISBN: 1520-5002

Complete thermodynamic characterization of second-order phase transition magnetocaloric materials exclusively through magnetometry

Pereira, CS; Almeida, R; Kiefe, R; Amorim, C; Silva, DJ; Amaral, JS; Belo, JH
2024, JOURNAL OF ALLOYS AND COMPOUNDS, 976.
ISBN: 1873-4669

Structural dynamics of first-order phase transition in giant magnetocaloric La(Fe,Si)13: The free energy landscape

Beleza, AA; Pires, B; Almeida, R; Evans, JSO; dos Santos, AM; Frontzek, M; Lovell, E; Beckmann, B; Skokov, K; Gutfleisch, O; Araujo, JP; Abeykoon, AMM; Amaral, JS; Belo, JH
2024, MATERIALS TODAY PHYSICS, 42.

Hybrid nanocomposites of Fe 3 O 4 /SiO 2-EDTA: Holistic comparison of one-step and two-step modification methods

Santos, GTAD; Estrada, AC; Amorim, CO; Amaral, JS; Deuermeier, J; Duarte, AC; Santos, PSM
2024, POWDER TECHNOLOGY, 444.
ISBN: 1873-328X

Curie temperature control in Zn-Fe ferrite superparamagnetic nanoparticles

Horta, AC; André, P; Amaral, JS; Amaral, S; Amorim, CO
2024, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 610.
ISBN: 1873-4766

Simulating the giant magnetocaloric effect-from mean-field theory to microscopic models

Amaral, JS; Amaral, VS
2023, FRONTIERS IN MATERIALS, 10.

Insights into Temperature Simulation and Validation of Fused Deposition Modeling Processes

Santos, T; Belbut, M; Amaral, J; Amaral, V; Ferreira, N; Alves, N; Pascoal-Faria, P
2023, JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING, 7, 6.

The ferromagnetic resonance (FMR) of SrZ hexaferrite (Sr3Co2Fe24O41), and the tuning of FMR with an external magnetic field

Pullar, RC; Galizia, P; Migliano, ACC; Amaral, JS; Galassi, C; Carvalho, FE
2023, CERAMICS INTERNATIONAL, 49, 14, 24407-24413.

Mapping the magnetocaloric effect at the microscale on a ferromagnetic shape memory alloy with infrared thermography

Pereira, MJ; Santos, T; Correia, R; Amaral, JS; Amaral, VS; Fabbrici, S; Albertini, F
2023, JOURNAL OF PHYSICS-MATERIALS, 6, 2.

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