Magnetic short- and long-range order in PbFe0.5Ta0.5O3

Article

关键词: SPIN-GLASS;    FERROELECTRIC STRUCTURES;    RIETVELD REFINEMENTS;    AU-FE;    NEUTRON;    DIFFRACTION;    BEHAVIOR;    SYSTEMS;   

DOI  :  10.1103/PhysRevB.89.174418

来源: SCIE

【 摘 要 】

PbFe1/2Ta1/2O3 (PFT) belongs to the family of PbB'(x) BO-1-x(3) which have inherent chemical disorder at the B site. Due to this disorder, a complex magnetic phase diagram is expected in thematerial. In this paper, we report experimental results of magnetic properties of PFT through macroscopic characterization, neutron scattering, and Mossbauer spectroscopy techniques. With these results we show for the first time that PbFe1/2Ta1/2O3 behaves very similar to PbFe1/2Nb1/2O3; i.e., it undergoes antiferromagnetic transition at 153 K and has a spin-glass transition at 10 K, below which the antiferromagnetism coexists with the spin glass. We suggest that the mechanism which is responsible for such a nontrivial ground state can be explained by a speromagnetlike spin arrangement similar to the one proposed for PbFe1/2Nb1/2O3.

【 授权许可】

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