MnSi${}_{1.7}$ nanoparticles embedded in Si: Superparamagnetism with a collective behavior

Abstract

The doping of Mn in Si is attracting research attentions due to the possibility to fabricate Si-based diluted magnetic semiconductors. However, the low solubility of Mn in Si favors the precipitation of Mn ions even at non-equilibrium growth conditions. MnSi${}_{1.7}$ nanoparticles are the common precipitates, which show exotic magnetic properties in comparison with the MnSi${}_{1.7}$ bulk phase. In this paper we present the static and dynamic magnetic properties of MnSi${}_{1.7}$ nanoparticles. Using the Preisach model, we derive the magnetic parameters, such as the magnetization of individual particles, the distribution of coercive fields and the inter-particle interaction field. Time-dependent magnetization measurements reveal a spin-glass behavior of the system.

11 pages, 6 figures, submitted to PRB

References in corpus (5)

• Structural and magnetic properties of Mn-implanted Si
• Spin-glass-like behavior of Ge:Mn
• Density-functional theory study of half-metallic heterostructures: interstitial Mn in Si
• The origin of the non-monotonic field dependence of the blocking temperature in magnetic nanoparticles
• Memory effect of Mn${}_5$Ge${}_3$ nanomagnets embedded inside a Mn-diluted Ge matrix

Cited by in corpus (4)

• Room temperature ferromagnetism and anomalous Hall effect in Si_{1-x}Mn_x (x = 0.35) alloys
• Surfactant mediated growth of ferromagnetic Mn δ-doped Si
• Electronic phase separation in insulating (Ga,Mn)As with low compensation: Super-paramagnetism and hopping conduction
• Magnetic properties, chemical and phase composition of thin manganese silicide films fabricated by pulsed laser deposition