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Search for "hardness" in Full Text gives 101 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

Pt segregation is probably overcompensated by the energy needed to form Fe3Pt from FePt. 2.4 Structure of FePt nanoparticles Since the magnetic hardness of FePt alloys strongly depends on the chemical order parameter, we investigated the structure of individual particles by aberration corrected HRTEM

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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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