Magnetic and topographical modifications of amorphous Co-Fe thin films induced by high energy Ag7+ ion irradiation

G. Pookat, T. Hysen, S. H. Al-Harthi, I. A. Al-Omari, R. Lisha, D. K. Avasthi, M. R. Anantharaman

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We have investigated the effects of swift heavy ion irradiation on thermally evaporated 44 nm thick, amorphous Co77Fe23 thin films on silicon substrates using 100 MeV Ag7+ ions fluences of 1 × 1011 ions/cm2, 1 × 1012 ions/cm2, 1 × 1013 ions/cm2, and 3 × 1013 ions/cm2. The structural modifications upon swift heavy irradiation were investigated using glancing angle X-ray diffraction. The surface morphological evolution of thin film with irradiation was studied using Atomic Force Microscopy. Power spectral density analysis was used to correlate the roughness variation with structural modifications investigated using X-ray diffraction. Magnetic measurements were carried out using vibrating sample magnetometry and the observed variation in coercivity of the irradiated films is explained on the basis of stress relaxation. Magnetic force microscopy images are subjected to analysis using the scanning probe image processor software. These results are in agreement with the results obtained using vibrating sample magnetometry. The magnetic and structural properties are correlated.

Original languageEnglish
Pages (from-to)81-86
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume310
DOIs
Publication statusPublished - 2013

Fingerprint

Ion bombardment
ion irradiation
Thin films
Ions
magnetic measurement
thin films
ions
energy
Irradiation
Magnetic force microscopy
X ray diffraction
irradiation
magnetic force microscopy
stress relaxation
Power spectral density
Magnetic variables measurement
Stress relaxation
Amorphous films
Coercive force
Heavy ions

Keywords

  • Amorphous structure
  • Co-Fe thin films
  • SHI irradiation
  • SRIM simulation
  • Structural modification

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

Cite this

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title = "Magnetic and topographical modifications of amorphous Co-Fe thin films induced by high energy Ag7+ ion irradiation",
abstract = "We have investigated the effects of swift heavy ion irradiation on thermally evaporated 44 nm thick, amorphous Co77Fe23 thin films on silicon substrates using 100 MeV Ag7+ ions fluences of 1 × 1011 ions/cm2, 1 × 1012 ions/cm2, 1 × 1013 ions/cm2, and 3 × 1013 ions/cm2. The structural modifications upon swift heavy irradiation were investigated using glancing angle X-ray diffraction. The surface morphological evolution of thin film with irradiation was studied using Atomic Force Microscopy. Power spectral density analysis was used to correlate the roughness variation with structural modifications investigated using X-ray diffraction. Magnetic measurements were carried out using vibrating sample magnetometry and the observed variation in coercivity of the irradiated films is explained on the basis of stress relaxation. Magnetic force microscopy images are subjected to analysis using the scanning probe image processor software. These results are in agreement with the results obtained using vibrating sample magnetometry. The magnetic and structural properties are correlated.",
keywords = "Amorphous structure, Co-Fe thin films, SHI irradiation, SRIM simulation, Structural modification",
author = "G. Pookat and T. Hysen and Al-Harthi, {S. H.} and Al-Omari, {I. A.} and R. Lisha and Avasthi, {D. K.} and Anantharaman, {M. R.}",
year = "2013",
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language = "English",
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TY - JOUR

T1 - Magnetic and topographical modifications of amorphous Co-Fe thin films induced by high energy Ag7+ ion irradiation

AU - Pookat, G.

AU - Hysen, T.

AU - Al-Harthi, S. H.

AU - Al-Omari, I. A.

AU - Lisha, R.

AU - Avasthi, D. K.

AU - Anantharaman, M. R.

PY - 2013

Y1 - 2013

N2 - We have investigated the effects of swift heavy ion irradiation on thermally evaporated 44 nm thick, amorphous Co77Fe23 thin films on silicon substrates using 100 MeV Ag7+ ions fluences of 1 × 1011 ions/cm2, 1 × 1012 ions/cm2, 1 × 1013 ions/cm2, and 3 × 1013 ions/cm2. The structural modifications upon swift heavy irradiation were investigated using glancing angle X-ray diffraction. The surface morphological evolution of thin film with irradiation was studied using Atomic Force Microscopy. Power spectral density analysis was used to correlate the roughness variation with structural modifications investigated using X-ray diffraction. Magnetic measurements were carried out using vibrating sample magnetometry and the observed variation in coercivity of the irradiated films is explained on the basis of stress relaxation. Magnetic force microscopy images are subjected to analysis using the scanning probe image processor software. These results are in agreement with the results obtained using vibrating sample magnetometry. The magnetic and structural properties are correlated.

AB - We have investigated the effects of swift heavy ion irradiation on thermally evaporated 44 nm thick, amorphous Co77Fe23 thin films on silicon substrates using 100 MeV Ag7+ ions fluences of 1 × 1011 ions/cm2, 1 × 1012 ions/cm2, 1 × 1013 ions/cm2, and 3 × 1013 ions/cm2. The structural modifications upon swift heavy irradiation were investigated using glancing angle X-ray diffraction. The surface morphological evolution of thin film with irradiation was studied using Atomic Force Microscopy. Power spectral density analysis was used to correlate the roughness variation with structural modifications investigated using X-ray diffraction. Magnetic measurements were carried out using vibrating sample magnetometry and the observed variation in coercivity of the irradiated films is explained on the basis of stress relaxation. Magnetic force microscopy images are subjected to analysis using the scanning probe image processor software. These results are in agreement with the results obtained using vibrating sample magnetometry. The magnetic and structural properties are correlated.

KW - Amorphous structure

KW - Co-Fe thin films

KW - SHI irradiation

KW - SRIM simulation

KW - Structural modification

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JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

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SN - 0168-583X

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