Abstract
YMnO3 and the Fe doped samples were prepared and the lattice constants, electrical conductivities and Seebeck coefficients were measured. The solubility limit of Fe for Mn of YMnO3 was 25 atomic %, the electrical conductivity increased in the range of 350°C - 700°C as Fe increased up to 10%, and the doped samples showed larger Seebeck coefficient than undoped samples.
Highlights
YMnO3 is known to crystallize in a hexagonal structure [1] and has both ferroelectric and antiferromagnetic properties [2] [3]
The samples prepared were evaluated by electrical properties, electrical conductivity and Seebeck coefficients
As for the mixture of Y2O3 and Mn2O3, only Y2O3 was clearly detected with X-ray diffraction (XRD)
Summary
YMnO3 is known to crystallize in a hexagonal structure [1] and has both ferroelectric and antiferromagnetic properties [2] [3]. The Curry and the Neel temperatures are 914 and 73 K, respectively. The crystal transition occurred from the space group of P63cm to P63/mcm 600 to 990 K [4]. Whereas pure YMnO3 is ferroelectric and insulating, it could be a conducting material with carrier doping. Gutierrez et al substitute Ni for Mn site of YMnO3 and observed hopping conduction behavior up to 700 ̊C [5]. In this study, sintered bodies of pure YMnO3 were prepared and the electrical conductivity and the thermoelectric power up to 800 ̊C were measured. The effect of Fe-substitution for Mn was examined
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