Structural,electrical and magnetic properties of cobalt ferrite with Nd3+ doping

• 作者: Regaty Anitha Reddy Kattepogu Rama Rao Bitra Rajesh Babu Guthikonda Kiran Kumar Cherukupalli Rajesh Anindita Chatterjee Nadella Krishna Jyothi
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: RARE METALS(Monthly)
• 页码范围: 240-245
• 页数: 6页
• 语种: 英文

摘要

A systematic study on the influence of Nd3+ sub-stitution on structural,magnetic and electrical properties of cobalt ferrite nanopowders obtained by sol-gel auto-com-bustion route was reported.The formation of spinel phase was confirmed by X-ray diffraction (XRD) data,and percolation limit of Nd3+ into the spinel lattice was also observed.Fourier transform infrared spectroscopy (FTIR) bands observed≈ 580 and ≈ 390 cm-1 support the presence of Fe3+ at A and B sites in the spinel lattice.The variation in microstructure was investigated by scanning electron microscopy (SEM),and the average grain size varies from 5.3 to 3.3 μm.The substitution of Nd3+ significantly affects the formation of pores and grain size of cobalt ferrite.Room-temperature sat-uration magnetization and coercivity decrease from 60 to 30 mA·m2·g-1 and 19.9-17.8 mT,respectively,with Nd3+substitution increasing.These decreases in magnetic proper-ties are explained based on the presence of non-magnetic nature of Nd3+ concentration and the dilution of super-ex-change interaction in the spinel lattice.The room-temperature direct-current electrical resistivity increases with Nd3+ con-centration increasing,which is due to the unavailability of Fe2+ at octahedral B sites.