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PreprintCC BY-NC-ND 4.0arXiv

Disorder-Induced Griffiths like Phase and Charge Localization in Sr2FeRuO6

  • Koustav Pal
  • Shuvendu Ghosh
  • I. Das
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Abstract

A comprehensive understanding of complex transition-metal oxides is key to designing next-generation spintronic materials with tailored magnetic and transport functionalities. We investigate the interplay among structural disorder, frustrated magnetism, and localized charge transport in the 3d-4d hybrid double perovskite Sr2FeRuO6. The compound adopts a monoclinic structure with significant B-site antisite disorder that drives its unconventional behavior. Magnetic measurements uncover a robust Griffiths phase extending well above the ordering temperature, evidencing stable short-range ferromagnetic clusters within a disordered matrix. Electrical transport remains strongly localized, transitioning from small-polaron hopping at high temperatures to variable-range hopping at intermediate temperatures. These results position Sr2FeRuO6 as a representative 3d-4d hybrid system in which quenched disorder stabilizes spin inhomogeneity, while polaronic and hopping transport are also observed.

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Cite

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BibTeX
@misc{pal2026disorderinduced,
  title = {{Disorder-Induced Griffiths like Phase and Charge Localization in Sr2FeRuO6}},
  author = {Koustav Pal and Shuvendu Ghosh and I. Das},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.20128},
  eprint = {2610.20128},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.20128},
  note = {CC BY-NC-ND 4.0},
}
RIS
TY  - UNPB
TI  - Disorder-Induced Griffiths like Phase and Charge Localization in Sr2FeRuO6
AU  - Koustav Pal
AU  - Shuvendu Ghosh
AU  - I. Das
PY  - 2026
DA  - 2026/10/14
PB  - arXiv
DO  - 10.48550/arxiv.2610.20128
UR  - https://arxiv.org/abs/2610.20128
AB  - A comprehensive understanding of complex transition-metal oxides is key to designing next-generation spintronic materials with tailored magnetic and transport functionalities. We investigate the interplay among structural disorder, frustrated magnetism, and localized charge transport in the 3d-4d hybrid double perovskite Sr2FeRuO6. The compound adopts a monoclinic structure with significant B-site antisite disorder that drives its unconventional behavior. Magnetic measurements uncover a robust Griffiths phase extending well above the ordering temperature, evidencing stable short-range ferromagnetic clusters within a disordered matrix. Electrical transport remains strongly localized, transitioning from small-polaron hopping at high temperatures to variable-range hopping at intermediate temperatures. These results position Sr2FeRuO6 as a representative 3d-4d hybrid system in which quenched disorder stabilizes spin inhomogeneity, while polaronic and hopping transport are also observed.
ER  -