Investigation of the effects of Tm3+ on the structural, microstructural, optical, and magnetic properties of Sr hexaferrites

• Published in: Results in physics Vol. 13; p. 102166
• Main Authors: Almessiere, M.A., Slimani, Y., Gungunes, H., Manikandan, A., Baykal, A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2019; Elsevier
• Subjects: Cation distribution; Hexaferrites; Magnetic properties; Mossbauer study; Optical study; Tm substitution; Tm substitution; Cation distribution; Mossbauer study; Optical study; Hexaferrites; Magnetic properties
• ISSN: 2211-3797; 2211-3797
• DOI: 10.1016/j.rinp.2019.102166

The magnetization exhibited the ferrimagnetic nature. The Tm3+ substitutions lead to decrease the magnetization and coercivity magnitudes. The magnetic results were investigated deeply with relation to structural and microstructural properties. According to SQR values, it is found the formation of single magnetic domain for x = 0.0 sample and multi magnetic domain structure for Tm3+ substituted Sr HFs (x ≥ 0.02). [Display omitted] •SrTmxFe12−xO4 (0.00 ≤ x ≤ 0.10) hexaferrites (HFs) are synthesized via sol-gel auto-combustion method.•It ferrimagnetic nature at RT and 10 K.•The obtained Hc values suggest that the produced HFs are promise candidates for potential magnetic recording applications. SrTmxFe12−xO4 (0.00 ≤ x ≤ 0.10) hexaferrites (HFs) are produced successfully using a sol–gel approach. The structural, optical, and magnetic properties are investigated. The hexagonal phase is confirmed for all the products. The magnetization is measured with respect to the applied magnetic field, M(H). The magnetic parameters including saturation magnetization Ms, remanence Mr, squareness ratio (SQR = Mr/Ms), coercivity Hc, and magnetic moment nB are deduced at room (300 K; RT) and low (10 K) temperatures. It is shown that the ferrimagnetic nature and Tm3+ substitutions lead to decreases in the magnetization and coercivity magnitudes. The results on magnetic properties are investigated extensively with respect to the structural and microstructural properties. The SQR values indicate the formation of a single magnetic domain for the x = 0.0 sample and a multi-magnetic domain structure for the Tm3+-substituted Sr HFs (x ≥ 0.02). The obtained Hc values suggest that the produced HFs are promising candidates for potential magnetic recording applications.