First-principles modeling of the magneto-optical response in inhomogeneous systems

Fabio Ricci, Franco D'Orazio, Alessandra Continenza, Franco Lucari, Arthur J. Freeman

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We develop an ab initio computational approach to calculate the magneto-optical Kerr effect spectra of layered and nanogranular compounds as a function of several structural and geometrical parameters: (i) composition, (ii) film thickness, and (iii) position, thickness, and number of the nonmagnetic interlayers. The case of nanoparticles in a matrix is treated within the effective-medium approximation and compared to a model (alternating composition layers approximation) that considers different compounds in a thin-film multilayered structure. The magneto-optical filter-amplifier effect of a nonmagnetic overlayer or interlayer and the dependence of the Kerr response on the specific sample composition suggest that our computational approach is a good starting point to build up structures with the desired magneto-optical characteristics and can be used to interpret experimental spectra to single out the microscopic structure and composition of the sample. The model is applied to the Mn-Ge binary system, considering both Mn5 Ge3 as a film or in a nanoparticle arrangement and Mnx Ge1-x diluted semiconductor as possible phases in pure form or intermixed with Ge.

Original languageEnglish
Article number134411
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume78
Issue number13
DOIs
Publication statusPublished - Oct 14 2008

Fingerprint

Chemical analysis
interlayers
Optical Kerr effect
Nanoparticles
nanoparticles
Optical filters
optical filters
Kerr effects
approximation
Film thickness
film thickness
amplifiers
Semiconductor materials
Thin films
matrices
thin films

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

First-principles modeling of the magneto-optical response in inhomogeneous systems. / Ricci, Fabio; D'Orazio, Franco; Continenza, Alessandra; Lucari, Franco; Freeman, Arthur J.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 78, No. 13, 134411, 14.10.2008.

Research output: Contribution to journalArticle

@article{1e80a5bf437647afb31160776fecc569,
title = "First-principles modeling of the magneto-optical response in inhomogeneous systems",
abstract = "We develop an ab initio computational approach to calculate the magneto-optical Kerr effect spectra of layered and nanogranular compounds as a function of several structural and geometrical parameters: (i) composition, (ii) film thickness, and (iii) position, thickness, and number of the nonmagnetic interlayers. The case of nanoparticles in a matrix is treated within the effective-medium approximation and compared to a model (alternating composition layers approximation) that considers different compounds in a thin-film multilayered structure. The magneto-optical filter-amplifier effect of a nonmagnetic overlayer or interlayer and the dependence of the Kerr response on the specific sample composition suggest that our computational approach is a good starting point to build up structures with the desired magneto-optical characteristics and can be used to interpret experimental spectra to single out the microscopic structure and composition of the sample. The model is applied to the Mn-Ge binary system, considering both Mn5 Ge3 as a film or in a nanoparticle arrangement and Mnx Ge1-x diluted semiconductor as possible phases in pure form or intermixed with Ge.",
author = "Fabio Ricci and Franco D'Orazio and Alessandra Continenza and Franco Lucari and Freeman, {Arthur J.}",
year = "2008",
month = "10",
day = "14",
doi = "10.1103/PhysRevB.78.134411",
language = "English",
volume = "78",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "13",

}

TY - JOUR

T1 - First-principles modeling of the magneto-optical response in inhomogeneous systems

AU - Ricci, Fabio

AU - D'Orazio, Franco

AU - Continenza, Alessandra

AU - Lucari, Franco

AU - Freeman, Arthur J.

PY - 2008/10/14

Y1 - 2008/10/14

N2 - We develop an ab initio computational approach to calculate the magneto-optical Kerr effect spectra of layered and nanogranular compounds as a function of several structural and geometrical parameters: (i) composition, (ii) film thickness, and (iii) position, thickness, and number of the nonmagnetic interlayers. The case of nanoparticles in a matrix is treated within the effective-medium approximation and compared to a model (alternating composition layers approximation) that considers different compounds in a thin-film multilayered structure. The magneto-optical filter-amplifier effect of a nonmagnetic overlayer or interlayer and the dependence of the Kerr response on the specific sample composition suggest that our computational approach is a good starting point to build up structures with the desired magneto-optical characteristics and can be used to interpret experimental spectra to single out the microscopic structure and composition of the sample. The model is applied to the Mn-Ge binary system, considering both Mn5 Ge3 as a film or in a nanoparticle arrangement and Mnx Ge1-x diluted semiconductor as possible phases in pure form or intermixed with Ge.

AB - We develop an ab initio computational approach to calculate the magneto-optical Kerr effect spectra of layered and nanogranular compounds as a function of several structural and geometrical parameters: (i) composition, (ii) film thickness, and (iii) position, thickness, and number of the nonmagnetic interlayers. The case of nanoparticles in a matrix is treated within the effective-medium approximation and compared to a model (alternating composition layers approximation) that considers different compounds in a thin-film multilayered structure. The magneto-optical filter-amplifier effect of a nonmagnetic overlayer or interlayer and the dependence of the Kerr response on the specific sample composition suggest that our computational approach is a good starting point to build up structures with the desired magneto-optical characteristics and can be used to interpret experimental spectra to single out the microscopic structure and composition of the sample. The model is applied to the Mn-Ge binary system, considering both Mn5 Ge3 as a film or in a nanoparticle arrangement and Mnx Ge1-x diluted semiconductor as possible phases in pure form or intermixed with Ge.

UR - http://www.scopus.com/inward/record.url?scp=55149101959&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=55149101959&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.78.134411

DO - 10.1103/PhysRevB.78.134411

M3 - Article

VL - 78

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 13

M1 - 134411

ER -