Electronic, electrical and dielectric analysis of Cr-doped hydroxyapatite

• Published in: Chemical physics letters 2021-05, Vol.771, p.138507, Article 138507
• Main Authors: Iqbal, Sajid, Younas, Muhammad, ul Hassan, Muhmood, Ryu, Ho Jin, Anjum, Mohsin Ali Raza, Farhan, M. Arshad, Nadeem, Muhammad, Yun, Jong-Il
• Format: Article
• Language: English
• Subjects: Biomaterials; Cr-doped Hydroxyapatite; Dielectric Properties; Impedance Spectroscopy
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/j.cplett.2021.138507

[Display omitted] •Electrical and dielectric properties of HA and Cr-HA are extensively investigated.•The conductivity of Cr-HA is increased suggesting its improved bio-conductivity.•Polyvalent Cr and OH site vacancies are proposed to reduce the overall conductivity.•Ionic conduction can effect the electrical and dielectric properties of Cr-HA. The electrical and the dielectric response of synthesized hydroxyapatite (HA) and Cr doped HA samples are obtained by impedance spectroscopy analysis. Variation in conductivity of materials was associated with the mutual interaction of Cr(III) and Cr(IV) with OH vacancies. The observed έ_LF and έ_HF dispersions of log έ vs log(f) spectra of HA and Cr-HA-100 are related to dipolar relaxations of H+ and OH− ions. The interfacial polarization is responsible for the colossal magnitude of dielectric constant and dielectric loss. This study suggests that the controlled ionic conduction, microstructure, and interfacial effects could produce excellent electrical and dielectric properties.