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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Late News Poster Session
Presentation Title NOW ON-DEMAND ONLY - H-36: Multiferroism of La Modified M-type Hexaferrites
Author(s) Guolong Tan, Congcong Duan, Nan Nan
On-Site Speaker (Planned) Guolong Tan
Abstract Scope Ferroelectric polarization and magnetic properties in La modified M-type hexaferrites (LaMFe12O19) will be presented, together with antiferroelectric characterization of heavily doped ferrites. The remnant polarization of the LaMFe12O19 ceramic changes from around 100 μC/cm2 down to 0 when La content varies from 0 up to 0.6, exhibiting large pure double hysteresis loops at room temperature. The phase transition peak for ferroelectrics to antiferroelectrics moves from 450C down to -126C in the temperature-dependent dielectric constant spectrum, leaving a wide space for the stay of full antiferroelectric phase at the vicinity of room temperature. The heavily rare earth doped hexaferrites display strong magnetodielectric effect with change ratio of 540% in dielectric cosntant as well as GMR effect upon a magnetic field of 1.1T. Strong ferromagnetic semiconducting performance was observed in this compound. The combination of antiferroelectricity and ferromagnetism provides us an opportunity to fabricate novel multiferroic memories and energy storage devices.
Proceedings Inclusion? Undecided
Keywords Ceramics, Electronic Materials, Magnetic Materials

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