Magnetic nanoscale aggregates of cobalt and nickel in MgO single crystals

Joana Vaz Pinto; Maria Margarida Cruz; Rui Manuel Coelho da Silva; Eduardo Jorge Alves; Roberto Gonzalez González; Maria Margarida Godinho

doi:10.1140/epjb/e2005-00202-8

Magnetic nanoscale aggregates of cobalt and nickel in MgO single crystals

Joana Vaz Pinto, Maria Margarida Cruz, Rui Manuel Coelho da Silva, Eduardo Jorge Alves, Roberto Gonzalez González, Maria Margarida Godinho

DF – Departamento de Física

Research output: Contribution to journal › Article

14 Citations (Scopus)

Abstract

The magnetic properties of Co and Ni nanosized aggregates formed after implantation of nickel and cobalt ions in magnesium oxide single crystals were investigated. The influence of the implantation energy and annealing treatments was characterized. The particle size distribution was determined from the combined analysis of the magnetic moment dependence on both magnetic field and temperature, and used to determine the magnetic anisotropy constant of the aggregates. The results for nickel aggregates indicate the presence of an antiferromagnetic layer after the annealing treatments.

Original language	English
Pages (from-to)	331-338
Journal	European Physical Journal B
Volume	45
Issue number	3
DOIs	https://doi.org/10.1140/epjb/e2005-00202-8
Publication status	Published - Jun 2005

Keywords

Aggregates
Annealing
Cobalt
Doping (additives)
Ferromagnetic materials
Impurities
Nanostructured materials
Nickel

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title = "Magnetic nanoscale aggregates of cobalt and nickel in MgO single crystals",

abstract = "The magnetic properties of Co and Ni nanosized aggregates formed after implantation of nickel and cobalt ions in magnesium oxide single crystals were investigated. The influence of the implantation energy and annealing treatments was characterized. The particle size distribution was determined from the combined analysis of the magnetic moment dependence on both magnetic field and temperature, and used to determine the magnetic anisotropy constant of the aggregates. The results for nickel aggregates indicate the presence of an antiferromagnetic layer after the annealing treatments.",

keywords = "Aggregates , Annealing , Cobalt , Doping (additives) , Ferromagnetic materials , Impurities , Nanostructured materials , Nickel",

author = "{Vaz Pinto}, Joana and Cruz, {Maria Margarida} and Silva, {Rui Manuel Coelho da} and Alves, {Eduardo Jorge} and Gonz{\'a}lez, {Roberto Gonzalez} and Godinho, {Maria Margarida}",

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T1 - Magnetic nanoscale aggregates of cobalt and nickel in MgO single crystals

AU - Vaz Pinto, Joana

AU - Cruz, Maria Margarida

AU - Silva, Rui Manuel Coelho da

AU - Alves, Eduardo Jorge

AU - González, Roberto Gonzalez

AU - Godinho, Maria Margarida

N1 - Sem PDF.

PY - 2005/6

Y1 - 2005/6

N2 - The magnetic properties of Co and Ni nanosized aggregates formed after implantation of nickel and cobalt ions in magnesium oxide single crystals were investigated. The influence of the implantation energy and annealing treatments was characterized. The particle size distribution was determined from the combined analysis of the magnetic moment dependence on both magnetic field and temperature, and used to determine the magnetic anisotropy constant of the aggregates. The results for nickel aggregates indicate the presence of an antiferromagnetic layer after the annealing treatments.

AB - The magnetic properties of Co and Ni nanosized aggregates formed after implantation of nickel and cobalt ions in magnesium oxide single crystals were investigated. The influence of the implantation energy and annealing treatments was characterized. The particle size distribution was determined from the combined analysis of the magnetic moment dependence on both magnetic field and temperature, and used to determine the magnetic anisotropy constant of the aggregates. The results for nickel aggregates indicate the presence of an antiferromagnetic layer after the annealing treatments.

KW - Aggregates

KW - Annealing

KW - Cobalt

KW - Doping (additives)

KW - Ferromagnetic materials

KW - Impurities

KW - Nanostructured materials

KW - Nickel

U2 - 10.1140/epjb/e2005-00202-8

DO - 10.1140/epjb/e2005-00202-8

M3 - Article

VL - 45

SP - 331

EP - 338

JO - European Physical Journal B

JF - European Physical Journal B

SN - 1434-6028

IS - 3

ER -