Co/Pt nanodot arrays fabricated via pulsed laser deposition using the phase-separated diblock copolymer film as a template

Sung Chan Park; Joona Bang; Jeong Sook Ha; Chang Hyun Bae; Seung Min Park

doi:10.1166/jnn.2009.dk20

Co/Pt nanodot arrays fabricated via pulsed laser deposition using the phase-separated diblock copolymer film as a template

Sung Chan Park, Joona Bang, Jeong Sook Ha, Chang Hyun Bae, Seung Min Park

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

2 Citations (Scopus)

Abstract

We fabricated hexagonal arrays of Co/Pt nanodots on Si surfaces by pulsed laser deposition (PLD) using cylindrically phase-separated polystyrene-b- poly(methylmethacrylate) (PS-b-PMMA) diblock copolymer thin films as templates after the removal of PMMA. The size and the separation of the nanodots were 23 and 40 nm, respectively, and the density of the nanodots was 1.5 x 10 ¹¹/cm ². The magnetic properties of nanodot arrays measured by vibrating sample magnetometer were compared with those of PLD grown film. The films showed magnetic anisotropy with an easy axis in the in-plane direction, whereas no noticeable anisotropy was observed for nanodot arrays. In addition, the saturation magnetization (Ms) of both the Co/Pt nanodots and the film increased with the Pt content.

Original language	English
Pages (from-to)	2976-2980
Number of pages	5
Journal	Journal of Nanoscience and Nanotechnology
Volume	9
Issue number	5
DOIs	https://doi.org/10.1166/jnn.2009.dk20
Publication status	Published - 2009 May

Keywords

Block copolymer lithography
Cobalt/platinum nanodot arrays
Magnetic properties.
Pulsed laser deposition technique

ASJC Scopus subject areas

Bioengineering
General Chemistry
Biomedical Engineering
General Materials Science
Condensed Matter Physics

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10.1166/jnn.2009.dk20

Cite this

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title = "Co/Pt nanodot arrays fabricated via pulsed laser deposition using the phase-separated diblock copolymer film as a template",

abstract = "We fabricated hexagonal arrays of Co/Pt nanodots on Si surfaces by pulsed laser deposition (PLD) using cylindrically phase-separated polystyrene-b- poly(methylmethacrylate) (PS-b-PMMA) diblock copolymer thin films as templates after the removal of PMMA. The size and the separation of the nanodots were 23 and 40 nm, respectively, and the density of the nanodots was 1.5 x 10 11/cm 2. The magnetic properties of nanodot arrays measured by vibrating sample magnetometer were compared with those of PLD grown film. The films showed magnetic anisotropy with an easy axis in the in-plane direction, whereas no noticeable anisotropy was observed for nanodot arrays. In addition, the saturation magnetization (Ms) of both the Co/Pt nanodots and the film increased with the Pt content.",

keywords = "Block copolymer lithography, Cobalt/platinum nanodot arrays, Magnetic properties., Pulsed laser deposition technique",

author = "Park, {Sung Chan} and Joona Bang and Ha, {Jeong Sook} and Bae, {Chang Hyun} and Park, {Seung Min}",

year = "2009",

month = may,

doi = "10.1166/jnn.2009.dk20",

language = "English",

volume = "9",

pages = "2976--2980",

journal = "Journal of Nanoscience and Nanotechnology",

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publisher = "American Scientific Publishers",

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AU - Park, Sung Chan

AU - Bang, Joona

AU - Ha, Jeong Sook

AU - Bae, Chang Hyun

AU - Park, Seung Min

PY - 2009/5

Y1 - 2009/5

N2 - We fabricated hexagonal arrays of Co/Pt nanodots on Si surfaces by pulsed laser deposition (PLD) using cylindrically phase-separated polystyrene-b- poly(methylmethacrylate) (PS-b-PMMA) diblock copolymer thin films as templates after the removal of PMMA. The size and the separation of the nanodots were 23 and 40 nm, respectively, and the density of the nanodots was 1.5 x 10 11/cm 2. The magnetic properties of nanodot arrays measured by vibrating sample magnetometer were compared with those of PLD grown film. The films showed magnetic anisotropy with an easy axis in the in-plane direction, whereas no noticeable anisotropy was observed for nanodot arrays. In addition, the saturation magnetization (Ms) of both the Co/Pt nanodots and the film increased with the Pt content.

AB - We fabricated hexagonal arrays of Co/Pt nanodots on Si surfaces by pulsed laser deposition (PLD) using cylindrically phase-separated polystyrene-b- poly(methylmethacrylate) (PS-b-PMMA) diblock copolymer thin films as templates after the removal of PMMA. The size and the separation of the nanodots were 23 and 40 nm, respectively, and the density of the nanodots was 1.5 x 10 11/cm 2. The magnetic properties of nanodot arrays measured by vibrating sample magnetometer were compared with those of PLD grown film. The films showed magnetic anisotropy with an easy axis in the in-plane direction, whereas no noticeable anisotropy was observed for nanodot arrays. In addition, the saturation magnetization (Ms) of both the Co/Pt nanodots and the film increased with the Pt content.

KW - Block copolymer lithography

KW - Cobalt/platinum nanodot arrays

KW - Magnetic properties.

KW - Pulsed laser deposition technique

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ER -

Co/Pt nanodot arrays fabricated via pulsed laser deposition using the phase-separated diblock copolymer film as a template

Abstract

Keywords

ASJC Scopus subject areas

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