Influence of substrate topography on the growth and magnetic properties of obliquely deposited amorphous nanocolumns of Fe-Ni

Senoy Thomas, S. H. Al-Harthi, I. A. Al-Omari, R. V. Ramanujan, V. Swaminathan, M. R. Anantharaman

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We investigated the influence of substrate surface roughness on the structural and magnetic properties of obliquely deposited amorphous nanocolumns of Fe-Ni. Experiments showed that the surface roughness of the substrate greatly determines the morphology of the columnar structures and this in turn has a profound influence on the magnetic properties. Nucleation of Fe-Ni nanocolumns on a smooth silicon substrate was at random, while that on a rough glass substrate was defined by the irregularities on the substrate surface. It has been found that magnetic interaction between the nanocolumns prepared on a silicon substrate was due to their small inter-column separation. Well separated nanocolumns on a glass substrate resulted in exchange isolated magnetic domains. The size, shape and the distribution of nanocolumns can be tailored by appropriately choosing the surface roughness of the substrate. This will find potential applications in thin film magnetism.

Original languageEnglish
Article number215005
JournalJournal of Physics D: Applied Physics
Volume42
Issue number21
DOIs
Publication statusPublished - 2009

Fingerprint

Topography
Magnetic properties
topography
magnetic properties
Substrates
surface roughness
Surface roughness
Silicon
Glass
Magnetic domains
glass
Magnetism
silicon
magnetic domains
irregularities
Structural properties
Nucleation
nucleation
Thin films
thin films

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Cite this

Influence of substrate topography on the growth and magnetic properties of obliquely deposited amorphous nanocolumns of Fe-Ni. / Thomas, Senoy; Al-Harthi, S. H.; Al-Omari, I. A.; Ramanujan, R. V.; Swaminathan, V.; Anantharaman, M. R.

In: Journal of Physics D: Applied Physics, Vol. 42, No. 21, 215005, 2009.

Research output: Contribution to journalArticle

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AU - Anantharaman, M. R.

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