Superparamagnetic magnetic force microscopy tips

P. F. Hopkins; John Moreland; S. S. Malhotra; S. H. Liou

doi:10.1063/1.361969

Superparamagnetic magnetic force microscopy tips

P. F. Hopkins, John Moreland, S. S. Malhotra, S. H. Liou

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

We report on magnetic force microscopy (MFM) images of a thin-film magnetic recording head taken using batch micromachined silicon tips coated with nanocomposite Fe₆₀(SiO₂)₄₀ and Fe₇₀(SiO₂)₃₀ films. The small Fe grain size (<10 nm) and dilute Fe volume fraction (0.29-0.4) of these granular films produce tip coatings of low remanence and essentially zero coercivity, reduced ; by the superparamagnetic properties of these films. We have used these tips to obtain MFM images of the write field of the head with high spatial and magnetic-field resolution. In comparison to images taken using commercial Co₈₅Cr₁₅-coated tips, these MFM images show reduced tip memory effects and clearly delineate the gap field from the pole pieces.

Original language	English (US)
Pages (from-to)	6448-6450
Number of pages	3
Journal	Journal of Applied Physics
Volume	79
Issue number	8 PART 2B
DOIs	https://doi.org/10.1063/1.361969
State	Published - Apr 15 1996

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1063/1.361969

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title = "Superparamagnetic magnetic force microscopy tips",

abstract = "We report on magnetic force microscopy (MFM) images of a thin-film magnetic recording head taken using batch micromachined silicon tips coated with nanocomposite Fe60(SiO2)40 and Fe70(SiO2)30 films. The small Fe grain size (<10 nm) and dilute Fe volume fraction (0.29-0.4) of these granular films produce tip coatings of low remanence and essentially zero coercivity, reduced ; by the superparamagnetic properties of these films. We have used these tips to obtain MFM images of the write field of the head with high spatial and magnetic-field resolution. In comparison to images taken using commercial Co85Cr15-coated tips, these MFM images show reduced tip memory effects and clearly delineate the gap field from the pole pieces.",

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AU - Hopkins, P. F.

AU - Moreland, John

AU - Malhotra, S. S.

AU - Liou, S. H.

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N2 - We report on magnetic force microscopy (MFM) images of a thin-film magnetic recording head taken using batch micromachined silicon tips coated with nanocomposite Fe60(SiO2)40 and Fe70(SiO2)30 films. The small Fe grain size (<10 nm) and dilute Fe volume fraction (0.29-0.4) of these granular films produce tip coatings of low remanence and essentially zero coercivity, reduced ; by the superparamagnetic properties of these films. We have used these tips to obtain MFM images of the write field of the head with high spatial and magnetic-field resolution. In comparison to images taken using commercial Co85Cr15-coated tips, these MFM images show reduced tip memory effects and clearly delineate the gap field from the pole pieces.

AB - We report on magnetic force microscopy (MFM) images of a thin-film magnetic recording head taken using batch micromachined silicon tips coated with nanocomposite Fe60(SiO2)40 and Fe70(SiO2)30 films. The small Fe grain size (<10 nm) and dilute Fe volume fraction (0.29-0.4) of these granular films produce tip coatings of low remanence and essentially zero coercivity, reduced ; by the superparamagnetic properties of these films. We have used these tips to obtain MFM images of the write field of the head with high spatial and magnetic-field resolution. In comparison to images taken using commercial Co85Cr15-coated tips, these MFM images show reduced tip memory effects and clearly delineate the gap field from the pole pieces.

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Superparamagnetic magnetic force microscopy tips

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