Details

Autor(en) / Beteiligte

• Maayoufi, A.E.
• Sdiri, N.
• Valente, M.A.
• Horchani-Naifer, K.
• Férid, M.

Titel

Physical study of PrCu1-xZnxO3 perovskite for 0.0 ≤ x ≤ 0.3

Ist Teil von

• Journal of alloys and compounds, 2020-12, Vol.849, p.156239, Article 156239

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Bulk nanocrystalline samples of PrCu1-xZnxO3 (where x = 0.0, x = 0.1, x = 0.2 and x = 0.3) cuprates are prepared by the sol–gel based Pechini method. Samples were characterized by X-ray diffraction (XRD), differential scanning calorimetry DSC, FTIR, Raman spectroscopy, UV-VIS Diffuse Reflectance spectroscopic, Photoluminescence (PL), impedance spectroscopy and magnetization (M) measurements as a function of temperature and under magnetic fields. The XRD showed the single orthorhombic phase with space group Pnma. FTIR analysis confirmed the presence of Cu3+ and Cu2+ ions in our samples. Raman spectroscopy revealed the presence of many phonon modes, in particular, the B1g mode (120 cm−1) related to the existence of CuO6. The Tauc curves showed that the band gap decreased from 3.26 to 2.9 eV with Zn2+ amount. At room temperature, impedance spectroscopy in the range of 0.1 Hz–1 MHz revealed that electrical conductivity increases with Zn2+ amount. This result is linked with the observed increase of the Cu–O2–Cu angle which reflects the decrease of the cooperative Jahn-Teller effect. For x = 0.0, at temperature of 5 and 300K the M vs. H hysteresis loops exhibit an antiferromagnetic (AF) state and presented a low magnetocaloric effect at room temperature. •In our paper we have provided a new compound PrCu1-xZnxO3.•We have performed in detail Rietveld refinement.•PrCu1-xZnxO3 has good electrical and dielectric characteristics.•PrCu1-xZnxO3 is an excellent candidate for semiconductors and giant memories.•PrCu1-xZnxO3 exhibits a good magnetocaloric effect.