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Title: Magnetic properties of exchange-coupled trilayers of amorphous rare-earth-cobalt alloys

Abstract

From amorphous thin films from alloys of rare earths (Gd, Sm), yttrium or zirconium with cobalt we have prepared trilayers with very clean interfaces appropriate for the study of magnetic coupling. The sandwiches were typically Y-Co/Gd-Co/Y-Co and Sm-Co/X/Sm-Co{sup {prime}} (X=Gd-Co, Co-Zr, Co). The three individual layers are coupled magnetically by exchange interactions between cobalt moments throughout the entire sample. This coupling associated with the specific properties of the given alloy (magnetic moment, anisotropy, coercivity) leads to ferrimagnetic or ferromagnetic structures of the magnetization of adjacent layers and to novel magnetization processes. For systems consisting of magnetically hard external layers with different coercivities and a soft central layer (Sm-Co/X/Sm-Co{sup {prime}}, X=Gd-Co, Co-Zr), the influence of the central layer{close_quote}s thickness and type of the material on coupling and magnetization processes have been studied quantitatively. Numerical simulations using a one-dimensional model for describing the magnetization processes observed in sandwich systems fit the magnetization curves of these model systems particularly well. {copyright} {ital 1997} {ital The American Physical Society}

Authors:
; ;  [1]
  1. Laboratoire Louis Neel, C.N.R.S., BP 166, 38042 Grenoble Cedex 9 (France)
Publication Date:
OSTI Identifier:
496732
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 55; Journal Issue: 17; Other Information: PBD: May 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; GADOLINIUM ALLOYS; MAGNETIZATION; SAMARIUM ALLOYS; MAGNETIC MATERIALS; THIN FILMS; YTTRIUM ALLOYS; ZIRCONIUM ALLOYS; COBALT ALLOYS; EXCHANGE INTERACTIONS; COMPUTERIZED SIMULATION

Citation Formats

Wuechner, S, Toussaint, J C, and Voiron, J. Magnetic properties of exchange-coupled trilayers of amorphous rare-earth-cobalt alloys. United States: N. p., 1997. Web. doi:10.1103/PhysRevB.55.11576.
Wuechner, S, Toussaint, J C, & Voiron, J. Magnetic properties of exchange-coupled trilayers of amorphous rare-earth-cobalt alloys. United States. https://doi.org/10.1103/PhysRevB.55.11576
Wuechner, S, Toussaint, J C, and Voiron, J. Thu . "Magnetic properties of exchange-coupled trilayers of amorphous rare-earth-cobalt alloys". United States. https://doi.org/10.1103/PhysRevB.55.11576.
@article{osti_496732,
title = {Magnetic properties of exchange-coupled trilayers of amorphous rare-earth-cobalt alloys},
author = {Wuechner, S and Toussaint, J C and Voiron, J},
abstractNote = {From amorphous thin films from alloys of rare earths (Gd, Sm), yttrium or zirconium with cobalt we have prepared trilayers with very clean interfaces appropriate for the study of magnetic coupling. The sandwiches were typically Y-Co/Gd-Co/Y-Co and Sm-Co/X/Sm-Co{sup {prime}} (X=Gd-Co, Co-Zr, Co). The three individual layers are coupled magnetically by exchange interactions between cobalt moments throughout the entire sample. This coupling associated with the specific properties of the given alloy (magnetic moment, anisotropy, coercivity) leads to ferrimagnetic or ferromagnetic structures of the magnetization of adjacent layers and to novel magnetization processes. For systems consisting of magnetically hard external layers with different coercivities and a soft central layer (Sm-Co/X/Sm-Co{sup {prime}}, X=Gd-Co, Co-Zr), the influence of the central layer{close_quote}s thickness and type of the material on coupling and magnetization processes have been studied quantitatively. Numerical simulations using a one-dimensional model for describing the magnetization processes observed in sandwich systems fit the magnetization curves of these model systems particularly well. {copyright} {ital 1997} {ital The American Physical Society}},
doi = {10.1103/PhysRevB.55.11576},
url = {https://www.osti.gov/biblio/496732}, journal = {Physical Review, B: Condensed Matter},
number = 17,
volume = 55,
place = {United States},
year = {1997},
month = {5}
}