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Banca de DEFESA: MATEUS SOUZA DUTRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MATEUS SOUZA DUTRA
DATE: 06/12/2023
TIME: 14:00
LOCAL: Bloco B Auditório 8o Andar
TITLE:

Properties of localized magnetism in EuZn2P2


PAGES: 58
BIG AREA: Ciências Exatas e da Terra
AREA: Física
SUBÁREA: Física da Matéria Condensada
SPECIALTY: Ressonância Mag. e Relax. na Mat. Condens; Efeitos Mosbauer; Corr. Ang. Pertubada
SUMMARY:
Intermetallic compounds based on rare earths are widely studied today due to the quantity of phenomena and properties that can emerge in these materials. EuZn2P2 has recently been classified as a Zintl compound, which exhibits the coexistence of an antiferromagnetic (AFM) state and insulating character. EuZn2P2 has an antiferromagnetic ordering temperature of TN= 23 K, a temperature that is accessible when compared to compounds of the same 1-2-2 family. The crystal structure of EuZn2P2 is of the CaAl2i2 type, belonging to the P3m1 space group, which consists of a trigonal space group. In this work, we present a characterization of EuZn2P2, carried out through X-ray diffraction (XRD) measurements, energy-dispersive X-ray spectroscopy (EDS), specific heat, and magnetization. Measurements of specific heat as a function of temperature show the signature of the antiferromagnetic transition at TN= 23 K. Using Curie-Weiss analysis on susceptibility curves, we found an effective moment of pef= 7.00 μB for H∥c and pef= 7.00 μB for H⊥c, close to the expected values for Eu2+ with S = 7/2. Mössbauer spectroscopy and electron paramagnetic resonance measurements were also carried out, and through Mössbauer spectrum fitting, we determined that the magnetic moments of EuZn2P2 are out of the ab plane by an angle θ∼39°. These characterizations were performed with the aim of exploring the magnetic properties of EuZn2P2. 
 
 

COMMITTEE MEMBERS:
Presidente - Interno ao Programa - 1671599 - MARCOS DE ABREU AVILA
Membro Titular - Examinador(a) Interno ao Programa - 2605463 - JOSE ANTONIO SOUZA
Membro Titular - Examinador(a) Externo à Instituição - PASCOAL JOSÉ GIGLIO PAGLIUSO - UNICAMP
Membro Suplente - Examinador(a) Externo ao Programa - 1676378 - ADRIANO REINALDO VICOTO BENVENHO
Membro Suplente - Examinador(a) Externo à Instituição - JULIO ANTONIO LARREA JIMENEZ - USP
Notícia cadastrada em: 08/11/2023 16:00
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