CICECO » João Cunha de Sequeira Amaral

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

Gaspar Mamede Ribeiro Soares

Estudante de mestrado

Henrique Berganton de Souza

Estudante de mestrado

Rodrigo Kiefe Soares de Oliveira

Estudante de doutoramento

Projectos

Clean and efficient cooling in vaccine transportation using Rotating Magnetocaloric Effect (MAGCCINE )

Coordenador LocalEuropean Comission

Every year 1.5 million lives are lost worldwide due to insufficient access to vaccination while, paradoxically, over 50% of all produced vaccines are wasted, mostly due to ineffective temperature control during storage/transportation. The major challenges of the vaccine cold chain are the evermore strict limitations imposed on their aerial trans...

Desenvolvimento de camadas nanoestruturadas inteligentes para a deteção de corrosão em estruturas aquáticas (SMARTAQUA)

ParticipanteFundação para a Ciência e a Tecnologia

Corrosion is a result of thermodynamically-driven processed which occur due to the interaction of active metal alloys with the surrounding environment, leading to the degradation of metallic structures. The problem is particularly relevant in maritime offshore structures due to aggressive conditions such as high salinity and humidity. Although t...

Exploração de métodos de nano-fabricação de magnetes permanentes isentos de terras raras Si-Alnico de alta coercividade (EXPL/CTM-NAN/1614/2013)

CoordenadorFundação para a Ciência e a Tecnologia

Magnetes Permanentes Nano-fabricação Coercividade magnética Sustentabilidade de recursos estratégicos

Projeto de Investigação Exploratória: João Amaral (IF/01089/2015)

CoordenadorFundação para a Ciência e a Tecnologia

Refrigeração magnetocalorica por efeito desmagnetizante (MAGCAL)

Coordenador LocalFundação para a Ciência e a Tecnologia

Refrigeração magnetocalórica Imans Modelação Inteligência artificial

Publicações

The influence of annealing on the bimodal distribution of blocking temperatures of exchange biased bilayers

Ventura, J; Teixeira, JM; Paz, E; Amaral, JS; Costa, JD; Apolinario, A; Araujo, JP; Cardoso, S; Ferreira, R; Freitas, PP
2013, PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS, 7, 9, 676-680.

Magnetoelectric coupling in multiferroic heterostructure of rf-sputtered Ni-Mn-Ga thin film on PMN-PT

Teferi, MY; Amaral, VS; Lounrenco, AC; Das, S; Amaral, JS; Karpinsky, DV; Soares, N; Sobolev, NA; Kholkin, AL; Tavares, PB
2012, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 324, 11, 1872-1876.

Organic-inorganic hybrid materials based on iron(III)-polyoxotungstates and 1-butyl-3-methylimidazolium cations

Santos, FM; Brandao, P; Felix, V; Domingues, MRM; Amaral, JS; Amaral, VS; Nogueira, HIS; Cavaleiro, AMV
2012, DALTON TRANSACTIONS, 41, 39, 12145-12155.

On the Curie temperature dependency of the magnetocaloric effect

Belo, JH; Amaral, JS; Pereira, AM; Amaral, VS; Araujo, JP
2012, APPLIED PHYSICS LETTERS, 100, 24.

On the Curie temperature dependency of the magnetocaloric effect (vol 100, 242407, 2012)

Belo, JH; Amaral, JS; Pereira, AM; Amaral, VS; Araujo, JP
2012, APPLIED PHYSICS LETTERS, 101, 7.

Enhanced ferromagnetism and glassy state in phase separated La0.95Sr0.05MnO3+delta

De, K; Das, S; Roy, A; Dhak, P; Willinger, M; Amaral, JS; Amaral, VS; Giri, S; Majumder, S; Silva, CJR; Gomes, MJM; Mahapatra, PK
2012, JOURNAL OF APPLIED PHYSICS, 112, 10.

Dynamic off-centering of Cr3+ ions and short-range magneto-electric clusters in CdCr2S4

Oliveira, GNP; Pereira, AM; Lopes, AML; Amaral, JS; dos Santos, AM; Ren, Y; Mendonca, TM; Sousa, CT; Amaral, VS; Correia, JG; Araujo, JP
2012, PHYSICAL REVIEW B, 86, 22.

Oxygen ordering in the high-T-c superconductor HgBa2CaCu2O6+delta as revealed by perturbed angular correlation

Mendonca, TM; Correia, JG; Haas, H; Odier, P; Tavares, PB; da Silva, MR; Lopes, AML; Pereira, AM; Goncalves, JN; Amaral, JS; Darie, C; Araujo, JP
2011, PHYSICAL REVIEW B, 84, 9.

Unveiling the (De)coupling of magnetostructural transition nature in magnetocaloric R5Si2Ge2 (R = Tb, Gd) materials

Pereira, AM; Kampert, E; Moreira, JM; Zeitler, U; Belo, JH; Magen, C; Algarabel, PA; Morellon, L; Ibarra, MR; Goncalves, JN; Amaral, JS; Amaral, VS; Sousa, JB; Araujo, JP
2011, APPLIED PHYSICS LETTERS, 99, 13.

Estimating spontaneous magnetization from a mean field analysis of the magnetic entropy change

Amaral, JS; Silva, NJO; Amaral, VS
2010, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 322, 9-12, 1569-1571.

Synthesis and Characterisation of Magnetoelectric Ceramic Composites based on M-type Strontium and Barium Hexagonal Ferrites and Barium Titanate

In Jotania, RB; Mahmood, SH (Eds.), MAGNETIC OXIDES AND COMPOSITES
Medeiros, MSA; Amaral, JS; Pullar, RC
2018, 1-48, MILLERSVILLE, PA 17551 USA, MATERIALS RESEARCH FORUM LLC.
ISBN: 00433396700001

The Mean-Field Theory in the Study of Ferromagnets and the Magnetocaloric Effect

In Juan Carlos Moreno-Piraján (Eds.), Thermodynamics - Systems in Equilibrium and Non-Equilibrium
Amaral J S , Das S ,Amaral V S
2011, Rijeka, InTech.
ISBN: 978-953-307-283-8

João Cunha de Sequeira Amaral

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Últimas Notícias

Perfil biográfico

Projectos financiados

Publicações seleccionadas

Supervisões em Curso

Projectos

Clean and efficient cooling in vaccine transportation using Rotating Magnetocaloric Effect (MAGCCINE )

Coordenador LocalEuropean Comission

Desenvolvimento de camadas nanoestruturadas inteligentes para a deteção de corrosão em estruturas aquáticas (SMARTAQUA)

ParticipanteFundação para a Ciência e a Tecnologia

Exploração de métodos de nano-fabricação de magnetes permanentes isentos de terras raras Si-Alnico de alta coercividade (EXPL/CTM-NAN/1614/2013)

CoordenadorFundação para a Ciência e a Tecnologia

Projeto de Investigação Exploratória: João Amaral (IF/01089/2015)

CoordenadorFundação para a Ciência e a Tecnologia

Refrigeração magnetocalorica por efeito desmagnetizante (MAGCAL)

Coordenador LocalFundação para a Ciência e a Tecnologia

Publicações

The influence of annealing on the bimodal distribution of blocking temperatures of exchange biased bilayers

Magnetoelectric coupling in multiferroic heterostructure of rf-sputtered Ni-Mn-Ga thin film on PMN-PT

Organic-inorganic hybrid materials based on iron(III)-polyoxotungstates and 1-butyl-3-methylimidazolium cations

On the Curie temperature dependency of the magnetocaloric effect

On the Curie temperature dependency of the magnetocaloric effect (vol 100, 242407, 2012)

Enhanced ferromagnetism and glassy state in phase separated La0.95Sr0.05MnO3+delta

Dynamic off-centering of Cr3+ ions and short-range magneto-electric clusters in CdCr2S4

Oxygen ordering in the high-T-c superconductor HgBa2CaCu2O6+delta as revealed by perturbed angular correlation

Unveiling the (De)coupling of magnetostructural transition nature in magnetocaloric R5Si2Ge2 (R = Tb, Gd) materials

Estimating spontaneous magnetization from a mean field analysis of the magnetic entropy change

Synthesis and Characterisation of Magnetoelectric Ceramic Composites based on M-type Strontium and Barium Hexagonal Ferrites and Barium Titanate

The Mean-Field Theory in the Study of Ferromagnets and the Magnetocaloric Effect

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