Room temperature ferromagnetism at self-assembled monolayer modified Ag nanocluster–ZnO nanowire interface

Deng, S.; Loh, K. P.; Yi, J. B.; Ding, J.; Tan, H. R.; Lin, M.; Foo, Y. L.; Zheng, M.; Sow, C. H.
November 2008
Applied Physics Letters;11/10/2008, Vol. 93 Issue 19, p193111
Academic Journal
Magnetic characterization of ZnO nanowires (NW) decorated with thiol-capped Ag nanoclusters (NCs) reveals spontaneous field-dependent magnetization and hysteresis at room temperature. The saturation magnetization is temperature independent for the 13 nm thiol-capped Ag NCs but unexpectedly increases with temperature for the 4 nm thiol-capped Ag NCs. The high magnetic moment results from the efficient dispersal of Ag NCs on the ZnO NW scaffold and charge transfer interaction between Ag and ZnO. The anomalous magnetic behavior in 4 nm NCs may be due to the spin reorientation of Ag–S dipoles mediated by Zn–S dipoles.


Related Articles

  • Drag force measurement: A means for determining hysteresis loss. Garshelis, Ivan J.; Tollens, Stijn P. L.; Kari, Ryan J.; Vandenbossche, Lode P.; Dupré, Luc R. // Journal of Applied Physics;4/15/2006, Vol. 99 Issue 8, p08D910 

    A method for determining hysteresis losses in thin strips of soft magnetic materials is described. It is based on the measurement of a drag force which arises with the movement of the sample through the strong field existing in the space near a permanent magnet. Not associated with macro eddy...

  • Question of the Month answer.  // Process & Control Engineering (PACE);Apr2005, Vol. 58 Issue 3, p44 

    Provides information on the three basic definitions of hysteresis. Effect of residual magnetism on the magnetization of a ferrous substance lags the magnetizing force; Property of magnetic material that causes the magnetic induction for a given magnetizing force; Form of non-linearity on the...

  • Exchange Bias of Hysteresis Loop in the Ising Two-Dimensional Ferromagnet�Antiferromagnet Structure. Meilikhov, E. Z.; Farzetdinova, R. M. // Journal of Experimental & Theoretical Physics;Jun2005, Vol. 100 Issue 6, p1112 

    A simple analytical model is developed to explain the phenomenon of exchange bias of the hysteresis loop in a two-dimensional ferromagnet�antiferromagnet bilayer. A solution of the magnetic relaxation equation is obtained within the framework of the generalized mean field theory, which...

  • A Computational Model of Fatigue Fracture of Materials. Panasyuk, V. V.; Sylovanyuk, V. P. // Materials Science;May/Jun2003, Vol. 39 Issue 3, p351 

    We propose a rule for the description of the accumulation of damage in materials under the conditions of cyclic straining. By using this rule, we study the processes of cyclic elastoplastic straining at the crack tip and deduce new kinetic equations of fatigue-crack propagation. It is...

  • Hysteresis of tunnel current in w-GaN/AlGaN(0001) double-barrier structures. Razzhuvalov, A.; Grinyaev, S. // Semiconductors;May2008, Vol. 42 Issue 5, p580 

    On the basis of a self-consistent solution of the Schr�dinger and Poisson equations, the features of the tunnel-current hysteresis in w-GaN/AlGaN(0001) double-barrier structures are investigated. It is shown that the hysteresis loop depends on the mutual orientation of external and internal...

  • Influence of surface states on the extraction of transport parameters from InAs nanowire field effect transistors. Dayeh, Shadi A.; Soci, Cesare; Yu, Paul K. L.; Yu, Edward T.; Wang, Deli // Applied Physics Letters;4/16/2007, Vol. 90 Issue 16, p162112 

    The capacitive effects of interface trap states in top-gated InAs nanowire field effect transistors and their influence on the experimental extraction of transport parameters are discussed. Time resolved transfer characteristics exhibit transient behavior indicating surface state trapping and...

  • Decay of waves in a rod owing to the hysteresis-type loss of energy in a material. Yakupov, R. // Journal of Applied Mechanics & Technical Physics;Jan2010, Vol. 51 Issue 1, p89 

    Decay of waves propagating in a semi-infinite rod owing to the hysteresis-type loss of strain energy in the material is studied. Results of numerical calculations are given.

  • Long-term measurement of matric suction using thermal conductivity sensors. Nichol, Craig; Smith, Leslie; Beckie, Roger // Canadian Geotechnical Journal;Jun2003, Vol. 40 Issue 3, p587 

    Thermal conductivity (TC) sensors, which provide estimates of matric suction, were used in a field experiment designed to characterize unsaturated water movement through coarse mine waste rock at a mine site in northern Saskatchewan. Two years oF monitoring data were used to evaluate long-term...

  • Hysteresis in Reversal of Central European Mountain Lakes from Atmospheric Acidification. Kopáček, Jiří; Stuchlík, Evžen; Veselý, Josef; Schaumburg, Jochen; Anderson, Iris C.; Fott, Jan; Hejzlar, Josef; Vrba, Jaroslav // Water, Air & Soil Pollution: Focus;Mar2002, Vol. 2 Issue 2, p91 

    Extremely high emissions of S and N compounds in Central Europe (both ∼280 mmol m-2 yr-1) declined by ∼70 and ∼35%, respectively, during the last decade. Decreased deposition rates of SO4-2, NO3-, and NH4+ in the region paralleled emission declines. The reduction in atmospheric...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics