Author Page for Paulo de Tarso Cavalcante Freire

In Situ Raman Spectroscopy and Synchrotron X-Ray Diffraction Studies on Maleic Acid Under High Pressure Conditions

Number of pages: 13 Posted: 05 May 2023

F. M. Rufino, Daniel Linhares Militão Vasconcelos, Paulo de Tarso Cavalcante Freire, R. C. Oliveira, C.M.R. Remédios, J. H. Silva, Frederico Alabarse and José Alves Alves Lima Jr.

Federal University of Ceara, Federal University of Ceara, Federal University of Ceara, Federal University of Para, Federal University of Para, Federal University of Cariri, affiliation not provided to SSRN and Federal University of Ceara

Downloads 71 (867,774)

Abstract:

2.

Exploring Spin-Phonon Coupling, Barocaloric, and Polar Phonon Features in the Multiferroic [(CH3)2NH2][Mn(N3)3] Hybrid Perovskite

Number of pages: 33 Posted: 16 Apr 2026

Rosivaldo Xavier da Silva, Renata Rodrigues Hora, Ariel Nonato Almeida de Abreu Silva, José Avelar Sousa da Silva, Mayra Alexandra Padron Gomez, Claudia Gómez-Aguirre, Laura Maria Teodorio Vidal, A. P. Ayala, Paulo de Tarso Cavalcante Freire, Marcio A. Correa, Rodolfo Bezerra da Silva and Carlos W. A. Paschoal

Universidade Federal do Maranhão, affiliation not provided to SSRN, Universidade Federal do Maranhão, Federal University of Espirito Santo, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Federal University of Ceara, Federal University of Ceara, Universidade Federal do Rio Grande do Norte (UFRN) - Departamento de F´ısica, State University of Rio Grande do Norte and Federal University of Ceara

Downloads 44 (1,209,354)

Abstract:

3.

Temperature–Dependent Phase Behavior and Thermal Stability of Bismuth-Doped Tungsten Trioxide Nanowires

Number of pages: 23 Posted: 04 Jan 2025

Antonio Werbeson Miranda, Caique Diego de Abreu Lima, João Victor Barbosa Moura, Alan S. Menezes, Clenilton Costa dos Santos, Emerson da Silva do Nascimento, Moisés das Virgens Santana, José da Silva Júnior Ferreira, Paulo de Tarso Cavalcante Freire, Gardenia de Sousa Pinheiro and Cleânio da Luz Lima

affiliation not provided to SSRN, Pontifical Catholic University of Rio de Janeiro, affiliation not provided to SSRN, Universidade Federal do Maranhão, Universidade Federal do Maranhão, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Federal University of Ceara, affiliation not provided to SSRN and affiliation not provided to SSRN

Downloads 44 (1,157,785)

Abstract:

4.

Electronic Structure, Lattice Dynamics, and Pressure-Induced Phase Transitions in Gd2moo6: A Combined Theoretical and Experimental Study

Number of pages: 30 Posted: 26 Apr 2025

D. S. Luz, Luiz F. Lobato, Raí F. Juca, A. J. Ramiro de Castro, Francisco Ferreira de Sousa, W. Paraguassu, R.S. Silva, L.S.A. Olivier, Paulo de Tarso Cavalcante Freire and Gilberto D. Saraiva

Universidade Federal do Maranhão, affiliation not provided to SSRN, Universidade Estadual do Ceará, affiliation not provided to SSRN, Federal University of Para, affiliation not provided to SSRN, Universidade Federal do Ceara, Federal University of Ceara, Federal University of Ceara and Universidade Estadual do Ceará

Downloads 39 (1,196,171)

Abstract:

5.

Structural and Vibrational Analysis of Glycyl-L-Phenylalanine and Phase Transition Under High-Pressure

Number of pages: 21 Posted: 12 Jun 2023

José Avelar Sousa da Silva, Daniel Linhares Militão Vasconcelos, Raphaela Araújo de Lima, Adrya J. P. Cordeiro and Paulo de Tarso Cavalcante Freire

Federal University of Espirito Santo, Federal University of Ceara, affiliation not provided to SSRN, affiliation not provided to SSRN and Federal University of Ceara

Downloads 39 (1,263,436)

Citation 1

Abstract:

6.

Adenosine Hydrochloride – Dft, Hirshfeld Surface and High Pressure Raman Scattering

Number of pages: 28 Posted: 18 Jun 2024

Jhonatam de Oliveira Carvalho, João Gomes Oliveira Neto, Carlos Alberto Andrade Serra dos Santos, Fábio Furtado Leite, José Gadelha Silva Filho, Waldeci Paraguassu, Paulo de Tarso Cavalcante Freire, Adenilson Oliveira dos Santos and Pedro de Freitas Façanha Filho

affiliation not provided to SSRN, Federal University of Maranhão, affiliation not provided to SSRN, Federal University of Amapá, Universidade Estadual do Ceará, Federal University of Para, Federal University of Ceara, Federal University of Maranhão and affiliation not provided to SSRN

Downloads 35 (1,249,711)

Abstract:

7.

Low-Temperature and Pressure-Induced Conformational Change in Tutton Salt K2(So4)2ni(H2o)6: Structural, Vibrational and Magnetic Properties Combined with Dft Calculations

Number of pages: 31 Posted: 03 Apr 2025

Raí F. Juca, TIAGO PACHECO, João Gomes Oliveira Neto, Luiz F. Lobato, José Avelar Sousa da Silva, José Alves Alves Lima Jr., Paulo de Tarso Cavalcante Freire, Santunu Ghosh, Edinei Paiva, J. M. Soares and Gilberto D. Saraiva

Universidade Estadual do Ceará, affiliation not provided to SSRN, Federal University of Maranhão, affiliation not provided to SSRN, Federal University of Espirito Santo, Federal University of Ceara, Federal University of Ceara, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN and Universidade Estadual do Ceará

Downloads 33 (1,277,121)

Abstract:

8.

Cd(Gly-L-Phe)2 metal-peptide frameworks evolution under high pressure conditions

Number of pages: 24 Posted: 17 Mar 2026

Wagner Gomes, Daniel Linhares Militão Vasconcelos, José Avelar Sousa da Silva, Frederico Alabarse, José Gadelha Silva Filho and Paulo de Tarso Cavalcante Freire

Federal University of Ceara, Federal University of Ceara, Federal University of Espirito Santo, affiliation not provided to SSRN, Universidade Estadual do Ceará and Federal University of Ceara

Downloads 31 (1,345,526)

Abstract:

9.

Optical Tunning of High-Luminescent Iodine-Substituted Cspb2(Br0.84i0.16)5 Under Pressure

Number of pages: 28 Posted: 27 Apr 2024

Bruno Sousa Araújo, W. C. Ferreira, Mayra Alexandra Padron Gomez, Fabio Eduardo de Oliveira Medeiros, Paulo de Tarso Cavalcante Freire, Carlos William de Araújo Paschoal and A. P. Ayala

affiliation not provided to SSRN, Harvard University, affiliation not provided to SSRN, affiliation not provided to SSRN, Federal University of Ceara, affiliation not provided to SSRN and Federal University of Ceara

Downloads 30 (1,332,057)

Abstract:

10.

L-Tyrosine Methyl Ester Hydrochloride Crystal Under High Pressure and Dft Calculations

Number of pages: 30 Posted: 10 Aug 2024

Ronaldo Silva, Carlos Alberto Andrade Serra dos Santos, José Gadelha Silva Filho, Fábio Furtado Leite, Waldeci Paraguassu, Paulo de Tarso Cavalcante Freire and Pedro Freitas Facanha

affiliation not provided to SSRN, affiliation not provided to SSRN, Universidade Estadual do Ceará, Federal University of Amapá, Federal University of Para, Federal University of Ceara and affiliation not provided to SSRN

Downloads 27 (1,359,097)

Abstract:

11.

Raman Study of Pressure-Induced Phase Transitions in Imidazolium Manganese- Hypophosphite Hybrid Perovskite

Number of pages: 18 Posted: 17 Feb 2023

M. Maczka, Daniel Linhares Militão Vasconcelos and Paulo de Tarso Cavalcante Freire

Polish Academy of Sciences (PAS), Federal University of Ceara and Federal University of Ceara

Downloads 26 (1,372,601)

Abstract:

12.

Structural and Vibrational Properties of Phthalic Acid under High Pressure: A Combined Raman Spectroscopic and DFT Study

Number of pages: 39 Posted: 26 Sep 2025

Fernando V. S. Oliveira, R.S. Silva, L.S.A. Olivier, Paulo de Tarso Cavalcante Freire, Carlos Emidio Sampaio Nogueira and José Alves Alves Lima Jr.

Federal University of Ceara, Universidade Federal do Ceara, Federal University of Ceara, Federal University of Ceara, affiliation not provided to SSRN and Federal University of Ceara

Downloads 24 (1,424,331)

Citation 1

Abstract:

13.

Vibrational and Structural Characterization of Pure L-Glycine and L-Glycine Doped with ZnCl2

Number of pages: 42 Posted: 31 Dec 2025

H.L.C. Cedro, L. Baicere, E.F. Barros, N.J. Silva, R.G.S. Soares, Ailton José Terezo, Jorge Luiz brito de Faria, Anderson R. L. Caires, Paulo de Tarso Cavalcante Freire and Ricardo Rodrigues de França Bento

affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, National University of East Timor, affiliation not provided to SSRN, affiliation not provided to SSRN, Universidade Federal de Mato Grosso, Universidade Federal de Mato Grosso do Sul, Federal University of Ceara and Universidade Federal de Mato Grosso

Downloads 22 (1,424,331)

Abstract:

14.

High-Temperature Raman Spectra of Dipeptide Α-L-Aspartyl-L-Alanine Crystal

Number of pages: 13 Posted: 25 Nov 2022

Rosilene Fonseca da Silva, Cleânio da Luz Lima, Paulo de Tarso Cavalcante Freire and Gardenia de Sousa Pinheiro

affiliation not provided to SSRN, affiliation not provided to SSRN, Federal University of Ceara and affiliation not provided to SSRN

Downloads 22 (1,424,331)

Abstract:

15.

A Novel Palladium-Doped KH2PO4 Crystal: A High-Temperature Characterization Study

Number of pages: 7 Posted: 09 Jun 2026

SANCLAYTON GERALDO CARNEIRO MOREIRA, José Augusto dos Santos Cardoso, Yuri Borges, Francisco Ferreira de Sousa, Paulo de Tarso Cavalcante Freire, C.M.R. Remédios, Adenilson Oliveira dos Santos and Luiz Fernando Lobato da Silva

Federal University of Para, Federal University of Para, Federal University of Para, Federal University of Para, Federal University of Ceara, Federal University of Para, Federal University of Maranhão and Federal University of Para

Downloads 11