Temperature effect on the magnetic property and ferroelectricity in hexaferrite SrFe12O19

Abstract

We studied the temperature effect on magnetic and electrical properties in bulk SrFe 12 O 19 prepared by conventional ceramic technique. The jumping behavior of magnetization has been observed under the zero-fieldcooling mode, but disappeared under the field-cooled cooling mode. The spin moment of iron ions reorients below 50 K leading to the magnetic structure changes. Magnetic parameters, saturation magnetization (Ms) and coercivity field (Hc), show opposite tendency with temperature throughout the measuring range, which is mainly ascribed to the Fe 3? ions situated at 4f 2 and 2b sites. The curves of electrical polarization P vs temperature T under different external magnetic field indicate the existence of ferroelectricity and magnetoelectric coupling effect at low temperature, and the transition temperature T P is about 120 K.

Structural, thermodynamic, and magnetic properties of SrFe12O19 hexaferrite modified by co-substitution of Cu and Gd

“…In addition, the magnetization during FCC measurement was increased by lowering the temperature for all studied samples except for a slight saltation for SFO and SGFCO-1 samples. The same type of behaviour was observed for the SrFe 12 O 19 samples by Gang Qiang 67 for the 50 Oe applied field. The primary distinction between ZFC and FCC is whether an external magnetic field is dominating throughout the cooling process.…”

Theoretical Study of Electric, Dielectric, and Optical Properties in Ion Doped Multiferroic SrFe12O19 Nanoparticles

“…The magnetoelectric coupling is taken to be linear because the ferroelectric critical temperature is much smaller than the ferromagnetic one [21,22]:…”

“…Significant discoveries have unveiled the remarkable coexistence of large ferroelectricity and robust ferromagnetism within SFO, with the ferroelectric critical temperature notably smaller than the ferromagnetic counterpart [21,22]. Moreover, investigations have revealed that BaFe 12 O 19 (BFO) and PbFe 12 O 19 (PFO) also exhibit ferroelectric (FE) properties.…”

Magnetodielectric Coupling Response in La‐Modified M‐Type Strontium Hexaferrite

“…M‐type hexaferrite is a traditional permanent magnet with high saturation magnetization and large magnetic coercivity . The ferroelectricity of M‐type hexaferrites has been verified by classic polarization hysteresis loops with good saturation, huge abnormal change in dielectric constants near Curie temperature for ferroelectric phase transition and two nonlinear I–V peaks for switching of polarization field or domains . However, the magnetoelectric coupling effect in pure SrFe 12 O 19 is pretty weak.…”