Magnetic vortex state and multi-domain pattern in electrodeposited hemispherical nanogranular nickel films

Farzad Nasirpouri; Alexander Samardak; Ekaterina Sukovatitsina; Alexey Ognev; Maksim Stebliy; Alexander Davydenko; Ludmila Chebotkevich; Young Keun Kim; Forough Nasirpouri; Seyed Mehdi Janjan

doi:10.1016/j.jmmm.2014.07.042

Magnetic vortex state and multi-domain pattern in electrodeposited hemispherical nanogranular nickel films

Farzad Nasirpouri, Alexander Samardak, Ekaterina Sukovatitsina, Alexey Ognev, Maksim Stebliy, Alexander Davydenko, Ludmila Chebotkevich, Young Keun Kim, Forough Nasirpouri, Seyed Mehdi Janjan

Department of Materials Science and Engineering

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

7 Citations (Scopus)

Abstract

Magnetic states of nickel nanogranular films were studied in two distinct structures of individual and agglomerated granules electrodeposited on n-type Si(1 1 1) surface from a modified Watts bath at a low pH of 2. Magnetic force microscopy and micromagnetic simulations revealed three-dimensional out-of-plane magnetic vortex states in stand-alone hemispherical granules and their arrays, and multi-domain patterns in large agglomerates and integrated films. Once the granules coalesce into small chains or clusters, the coercivity values increased due to the reduction of inter-granular spacing and strengthening of the magnetostatic interaction. Further growth leads to the formation of a continuous granulated film which strongly affected the coercivity and remanence. This was characterized by the domain wall nucleation and propagation leading to a stripe domain pattern. Magnetoresistance measurements as a function of external magnetic field are indicative of anisotropic magnetoresistance (AMR) for the continuous films electrodeposited on Si substrate.

Original language	English
Pages (from-to)	149-156
Number of pages	8
Journal	Journal of Magnetism and Magnetic Materials
Volume	371
DOIs	https://doi.org/10.1016/j.jmmm.2014.07.042
Publication status	Published - 2014 Dec

Bibliographical note

Funding Information:
Student financial supports from Iranian Nanotechnology Initiative and Research Affairs of Sahand University of Technology are acknowledged. This work was supported in part by the Russian Ministry of Education and Science , the Scientific Fund of Far Eastern Federal University, and the Joint Research Program by the National Research Foundation of Korea ( 2013K2A1A7076318 ) and the Russian Foundation for Basic Research ( 14-02-91701 ).

Keywords

Electrodeposition
Magnetic domains
Magnetic particles
Magnetization reversal
Vortex state

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1016/j.jmmm.2014.07.042

Cite this

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title = "Magnetic vortex state and multi-domain pattern in electrodeposited hemispherical nanogranular nickel films",

abstract = "Magnetic states of nickel nanogranular films were studied in two distinct structures of individual and agglomerated granules electrodeposited on n-type Si(1 1 1) surface from a modified Watts bath at a low pH of 2. Magnetic force microscopy and micromagnetic simulations revealed three-dimensional out-of-plane magnetic vortex states in stand-alone hemispherical granules and their arrays, and multi-domain patterns in large agglomerates and integrated films. Once the granules coalesce into small chains or clusters, the coercivity values increased due to the reduction of inter-granular spacing and strengthening of the magnetostatic interaction. Further growth leads to the formation of a continuous granulated film which strongly affected the coercivity and remanence. This was characterized by the domain wall nucleation and propagation leading to a stripe domain pattern. Magnetoresistance measurements as a function of external magnetic field are indicative of anisotropic magnetoresistance (AMR) for the continuous films electrodeposited on Si substrate.",

keywords = "Electrodeposition, Magnetic domains, Magnetic particles, Magnetization reversal, Vortex state",

author = "Farzad Nasirpouri and Alexander Samardak and Ekaterina Sukovatitsina and Alexey Ognev and Maksim Stebliy and Alexander Davydenko and Ludmila Chebotkevich and {Keun Kim}, Young and Forough Nasirpouri and Janjan, {Seyed Mehdi}",

note = "Funding Information: Student financial supports from Iranian Nanotechnology Initiative and Research Affairs of Sahand University of Technology are acknowledged. This work was supported in part by the Russian Ministry of Education and Science , the Scientific Fund of Far Eastern Federal University, and the Joint Research Program by the National Research Foundation of Korea ( 2013K2A1A7076318 ) and the Russian Foundation for Basic Research ( 14-02-91701 ).",

year = "2014",

month = dec,

doi = "10.1016/j.jmmm.2014.07.042",

language = "English",

volume = "371",

pages = "149--156",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Magnetic vortex state and multi-domain pattern in electrodeposited hemispherical nanogranular nickel films

AU - Nasirpouri, Farzad

AU - Samardak, Alexander

AU - Sukovatitsina, Ekaterina

AU - Ognev, Alexey

AU - Stebliy, Maksim

AU - Davydenko, Alexander

AU - Chebotkevich, Ludmila

AU - Keun Kim, Young

AU - Nasirpouri, Forough

AU - Janjan, Seyed Mehdi

N1 - Funding Information: Student financial supports from Iranian Nanotechnology Initiative and Research Affairs of Sahand University of Technology are acknowledged. This work was supported in part by the Russian Ministry of Education and Science , the Scientific Fund of Far Eastern Federal University, and the Joint Research Program by the National Research Foundation of Korea ( 2013K2A1A7076318 ) and the Russian Foundation for Basic Research ( 14-02-91701 ).

PY - 2014/12

Y1 - 2014/12

N2 - Magnetic states of nickel nanogranular films were studied in two distinct structures of individual and agglomerated granules electrodeposited on n-type Si(1 1 1) surface from a modified Watts bath at a low pH of 2. Magnetic force microscopy and micromagnetic simulations revealed three-dimensional out-of-plane magnetic vortex states in stand-alone hemispherical granules and their arrays, and multi-domain patterns in large agglomerates and integrated films. Once the granules coalesce into small chains or clusters, the coercivity values increased due to the reduction of inter-granular spacing and strengthening of the magnetostatic interaction. Further growth leads to the formation of a continuous granulated film which strongly affected the coercivity and remanence. This was characterized by the domain wall nucleation and propagation leading to a stripe domain pattern. Magnetoresistance measurements as a function of external magnetic field are indicative of anisotropic magnetoresistance (AMR) for the continuous films electrodeposited on Si substrate.

AB - Magnetic states of nickel nanogranular films were studied in two distinct structures of individual and agglomerated granules electrodeposited on n-type Si(1 1 1) surface from a modified Watts bath at a low pH of 2. Magnetic force microscopy and micromagnetic simulations revealed three-dimensional out-of-plane magnetic vortex states in stand-alone hemispherical granules and their arrays, and multi-domain patterns in large agglomerates and integrated films. Once the granules coalesce into small chains or clusters, the coercivity values increased due to the reduction of inter-granular spacing and strengthening of the magnetostatic interaction. Further growth leads to the formation of a continuous granulated film which strongly affected the coercivity and remanence. This was characterized by the domain wall nucleation and propagation leading to a stripe domain pattern. Magnetoresistance measurements as a function of external magnetic field are indicative of anisotropic magnetoresistance (AMR) for the continuous films electrodeposited on Si substrate.

KW - Electrodeposition

KW - Magnetic domains

KW - Magnetic particles

KW - Magnetization reversal

KW - Vortex state

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DO - 10.1016/j.jmmm.2014.07.042

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AN - SCOPUS:84905974357

SN - 0304-8853

VL - 371

SP - 149

EP - 156

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

ER -

Magnetic vortex state and multi-domain pattern in electrodeposited hemispherical nanogranular nickel films

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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