Journal
MENDELEEV COMMUNICATIONS
Volume 32, Issue 3, Pages 305-307Publisher
ELSEVIER
DOI: 10.1016/j.mencom.2022.05.004
Keywords
oxypnictide superconductor; SmFeAsO0.8F0.2; high-pressure synthesis; magnetic susceptibility; spin-glass-like behavior
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Funding
- Laboratory for Solid State Physics, ETH Zurich
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The iron-based oxypnictide superconductor SmFeAsO0.8F0.2 was synthesized under high pressure and showed bulk superconductivity along with antiferromagnetic behavior. The significant jump in magnetization observed at low temperature suggests a spin-glass-like behavior in this material.
The iron-based oxypnictide superconductor SmFeAsO0.8F0.2 was synthesized under high pressure and investigated by measuring the dc magnetic susceptibility. The zero-field cooled (ZFC) magnetic susceptibility confirmed the bulk superconductivity of the sample with a critical temperature T-c 50 K and a significant jump in magnetization at ~4.3 K, usually attributed to the antiferromagnetic ordering of Sm3+ ions in this system. Since the occurrence of the jump depends on the cooling history, our data strongly suggest a spin-glass-like behavior.
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