Magnetic short and long range order in PbFe\(_{1/2}\)Ta\(_{1/2}\)O\(_{3}\)

• Published in: arXiv.org
• Main Authors: Chillal, S, Gvasaliya, S N, Schroeter, D, Kraken, M, Litterst, F J, Shaplygina, T A, Lushnikov, S G, Zheludev, A
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 22.04.2014
• Subjects: Antiferromagnetism; Long range order; Magnetic properties; Neutron scattering; Neutrons; Organic chemistry; Phase diagrams; Physics - Strongly Correlated Electrons
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1402.2914

PbFe\(_{1/2}\)Ta\(_{1/2}\)O\(_{3}\) (PFT) belongs to the family of PbB\('_{x}\)B\("_{1-x}\)O\(_{3}\) which have inherent chemical disorder at the B-site. Due to this disorder, a complex magnetic phase diagram is expected in the material. In this paper, we report experimental results of magnetic properties in PFT through macroscopic characterization, neutron scattering and M\"{o}ssbauer spectroscopy techniques. With these results we show for the first time that PbFe\(_{1/2}\)Ta\(_{1/2}\)O\(_{3}\) behaves very similar to PbFe\(_{1/2}\)Nb\(_{1/2}\)O\(_{3}\), i.e, it undergoes AF transition at 153 K and has a spinglass transition at 10 K, below which the antiferromagnetism coexists with spinglass. We suggest that the mechanism which is responsible for such a non-trivial ground state can be explained by a speromagnet-like spin arrangement similar to the one proposed for PbFe\(_{1/2}\)Nb\(_{1/2}\)O\(_{3}\).