Journal
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 98, Issue 6, Pages 1812-1817Publisher
WILEY
DOI: 10.1111/jace.13530
Keywords
-
Categories
Funding
- Hubei Natural Science Foundation [2014CFB166]
- Undergraduate Students' Innovative Foundation of WHUT [20141049701018]
Ask authors/readers for more resources
Polarization and related properties in the M-type lead hexaferrite (PbFe12O19) are reported for the first time. The remnant polarization of PbFe12O19 exhibits a maximum value of 104C/cm(2), as well as large spontaneous polarization at room temperature. Annealing of PbFe12O19 in oxygen plays a key role in the saturation of its polarization hysteresis loop because it greatly enhances the ceramic's electric resistance. Two current peaks in the I-V curve reveal a polarization switch, providing effective evidence for the ferroelectricity of PbFe12O19. Its temperature-dependent dielectric constant undergoes colossal change in the vicinity of two temperatures (322 degrees C and 518 degrees C), which are assigned to the transitions from ferro- to antiferro- and antiferro- to paraelectric phases, respectively. The plots of logarithm of (1/epsilon-1/epsilon(m)) as a function of logarithm of (T-T-m) obey a modified Curie-Weiss law, verifying the relaxor ferroelectric characterization of PbFe12O19. The ceramic also exhibits a strong magnetic hysteresis loop. These combined functional responses of ferroelectricity and ferromagnetism in PbFe12O19 ceramic present an opportunity to create electric devices that actively couple the magnetic and ferroelectric orders.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available