Coexistence of ferromagnetism and superconductivity in Sn nanoparticles

W.-H. Li; C.-W. Wang; C.-Y. Li; C. K. Hsu; C. C. Yang; C.-M. Wu

doi:10.1103/PhysRevB.77.094508

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Coexistence of ferromagnetism and superconductivity in Sn nanoparticles

W.-H. Li, C.-W. Wang, C.-Y. Li, C. K. Hsu, C. C. Yang, C.-M. Wu

DOI 10.1103/PhysRevB.77.094508 · Physical Review B

T1

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Abstract

We report on the observations of ferromagnetic spin polarized moment and superconductivity in Sn nanoparticles. Ferromagnetic spin polarization, which is characterized by the appearance of Langevin magnetic-field profiles for magnetization, persists even at room temperature. At temperatures below 15K, magnetic hysteresis emerges in the weak applied magnetic-field regime. Enhanced superconductivity is found for particles with diameters smaller than 16nm but larger than 9nm. The presence of a magnetic field in the superconducting phase reveals a regime in which the magnetic susceptibility and magnetization increase with decreasing temperature. We attribute these behaviors to the coexistence of ferromagnetic spin polarized moment and superconductivity at low temperatures.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	4.05	Pressure not reported	unknown