Coexisting superconductivity and magnetism in the superconducting ferromagnet CeO0.5F0.5BiS2 investigated by muon spin rotation and relaxation
Xin Li, Jian Zhang, Zhaofeng Ding, Cheng Tan, Kevin Huang, Oscar O. Bernal, Pei-Chun Ho, Changsheng Chen, Yanxing Yang, Jiachen Jiao, Kaiwen Chen, Zihao Zhu, Qiong Wu, Chengyu Jiang, Muyuan Zou, Toni Shiroka, Benqiong Liu, Guang-Ai Sun, Douglas E. MacLaughlin, Duygu Yazici, M. Brain Maple, Lei Shu
DOI 10.1103/PhysRevB.111.104504 · Physical Review B
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Abstract
Magnetic and superconducting properties of the layered superconducting ferromagnet CeO0.5F0.5BiS2 are investigated by specific heat and magnetization measurements and muon spin rotation/relaxation (μSR). A specific-heat anomaly, an abrupt increase of magnetic susceptibility, and bifurcation of zero-field-cooled and field-cooled magnetization indicate ferromagnetic (FM) order below 7.5 K. Hysteresis loops yield a Ce3+ ordered moment of 0.22(1)μB. A low-temperature Schottky specific-heat anomaly indicates a splitting of Ce3+ Kramers-doublet ground states, consistent with Orbach-process Ce3+ spin dynamics observed in zero-field μSR. Transverse-field μSR results indicate bulk superconductivity below ∼2 K and microscopic coexistence of superconductivity and FM order in separate layers. The static local field observed by zero-field μSR in the FM phase is small (∼0.2 mT), indicating that Ce3+ dipolar fields nearly cancel at muon stopping sites.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CeO0.5F0.5BiS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.3 | Pressure not reported | unknown |
| CeO0.5F0.5BiS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2 | Pressure not reported | onset |
| LaO0.5F0.5BiS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3 | Pressure not reported | unknown |
| CeO1-xFxBiS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2 | 2 GPa | unknown |
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