Structural and magnetic properties of Mn-implanted Si

Abstract

Structural and ferromagnetic properties in Mn implanted, p-type Si were investigated. High resolution structural analysis techniques like synchrotron X-ray diffraction revealed the formation of MnSi1.7 nanoparticles already in the as implanted samples. Depending on the Mn-fluence, the size increases from 5 nm to 20 nm upon rapid thermal annealing. No significant evidence is found for Mn substituting Si sites either in the as-implanted or annealed samples. The observed ferromagnetism yields a saturation moment of 0.21 mu_B per implanted Mn at 10 K, which could be assigned to MnSi1.7 nanoparticles as revealed by a temperature dependent magnetization measurement.

21 pages, 6 figures, accepted for publicaiton at Phys. Rev. B

References in corpus (4)

• Ferromagnetism in substituted zinc oxide
• Ferromagnetic Semiconductors: Moving Beyond (Ga,Mn)As
• Phase Inhomogeneity of the Itinerant Ferromagnet MnSi at High Pressures
• Crystalline Ni nanoparticles as the origin of ferromagnetism in Ni implanted ZnO crystals

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• Surfactant mediated growth of ferromagnetic Mn δ-doped Si
• Magnetic anisotropy of polycrystalline high-temperature ferromagnetic Mn${}_x$Si${}_{1-x}$ ($x\approx 0.5$) alloy films