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Search for "dichroism" in Full Text gives 51 result(s) in Beilstein Journal of Nanotechnology.

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Preparation and characterization of supported magnetic nanoparticles prepared by reverse micelles

Ulf Wiedwald,
Luyang Han,
Johannes Biskupek,
Ute Kaiser and
Paul Ziemann

Beilstein J. Nanotechnol. 2010, 1, 24–47, doi:10.3762/bjnano.1.5

magnetic circular dichroism (XMCD) which provides information on (i) the chemical state of sample, (ii) element-specific magnetic moments and (iii) element-specific hysteresis loops. The results presented below were measured at beamline PM-3 of the BESSY II synchrotron facility in Berlin, Germany. The

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Scheme 1: Preparation of NPs by a reverse micelle technique. PS-b-P2VP or PS-b-P4VP is dispersed in anhydrous...

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Figure 1: CoCl₂ loaded PS(1779)-b-P2VP(857) reverse micelles deposited at different dip-coating velocities; (...

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Figure 2: Co NPs prepared from CoCl₂-loaded PS(1779)-b-P2VP(857) reverse micelles deposited on a Si AFM-tip b...

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Figure 3: Fe (left column) and Co (right column) NPs prepared from PS(312)-P2VP(71) (upper panels) and PS(177...

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Figure 4: SEM micrographs of FePt NPs with 2.6 nm, 4.5 nm, and 9.4 nm diameter (top panels) and their AFM hei...

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Figure 5: Photoelectron spectroscopy of Co-precursor loaded PS(1779)-P2VP(857) reverse micelles after differe...

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Figure 6: Pt-4f and Fe-2p XPS spectra of 9.8 nm FePt particles before and after exposure to ambient air for 2...

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Figure 7: TEM images of 3 nm FePt NPs on Si/SiO₂ after annealing at 650 °C for 90 min. (a) Bright-field TEM i...

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Figure 8: Aberration corrected HRTEM images of FePt particles seen along [100] direction. The L1₀ ordering al...

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Figure 9: Aberration corrected HR-TEM images of about 8 nm FePt NPs in [101] orientation. Crystal defects such as ...

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Figure 10: (a) Schematics of the compensation approach: Temperature dependence of the magnetic susceptibility ...

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Figure 11: (a) DC-demagnetization and isothermal remanent magnetization of 8 nm Co particles measured by SQUID...

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Figure 12: Element-specific magnetic hysteresis loops of 5.8 nm FePt NPs taken at the Fe-L₃ edge at T = 11 K a...

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Figure 13: Coercive field at T = 300 K as function of the diameter of FePt NPs after annealing for 30 min at T...

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Figure 14: Experimental hysteresis loops of 5.8 nm FePt NPs at 11 K and simulations using a bimodal Gaussian K...

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Figure 15: Distributions of the effective anisotropy K_eff for arrays of differently sized NPs used for simulat...

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Figure 16: (a) Coercive fields at T = 11 K and T = 300 K as function of 30 min annealing time at temperature T_A...

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Figure 17: Co-L_3,2 XA and XMCD spectra of 5.6 nm Co₅₆Pt₄₄ NPs after annealing at 700 °C taken at external fiel...

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Figure 18: Element-specific magnetic hysteresis loops of 5.8 nm Co₅₆Pt₄₄ NPs taken at the Co-L₃ edge maximum d...

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Figure 19: SEM images of 8 nm Co-based NP after oxygen plasma (a) and after Au photoseeding of reduced particl...

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Published 22 Nov 2010

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