Terahertz magnetic response and high dielectric constant in Ti:SmFeO3 composite ceramics

• The magnetization and THz electromagnetic responses of ceramics are characterized.
• The composite ceramic has larger magnetic moment.
• The composite ceramic has higher dielectric constants.
• The Ti:SmFeO3 ceramic can be used in spin devices, tunable or miniaturized devices.

In this letter, the macroscopic magnetic properties as well as terahertz magnetic and electric responses of Ti doped SmFeO3 ceramic are thoroughly investigated. It is observed that the magnetization is enhanced for the composite ceramic, indicating that the ferromagnetic moment becomes easier to reorient with the applied field after adding Ti. The antiferromagnetic mode has a blue-shift for the doped sample below 273 K due to the increased anisotropy constant. It is also shown that the terahertz dielectric constants increase about 11% although the Ti concentration is only 1 at%. The composite ceramic with the electromagnetic properties of enhanced magnetism, high dielectric constant, as well as sensitivity of temperature and external field will have potentials for application in magnetic devices, miniaturized and tunable devices.