Journal ArticleDOI
New possibilities for tuning ultrathin cobalt film magnetic properties by a noble metal overlayer.
TLDR
The silver overlayer thickness-driven magnetic reorientation from easy axis to easy plane generates a new type of 90 degrees magnetic wall for cobalt thicknesses between 1.3 and 1.8 nm.Abstract:
Complementary multiscale magneto-optical studies based on the polar Kerr effect are carried out on an ultrathin cobalt wedge covered with a silver wedge and subsequently with the Au thick layer. A few monolayers of Ag are found to have a substantial effect on magnetic anisotropy, the coercivity field, and Kerr rotation. The silver overlayer thickness-driven magnetic reorientation from easy axis to easy plane generates a new type of 90 degrees magnetic wall for cobalt thicknesses between 1.3 and 1.8 nm. The tuning of the wall width in a wide range is possible. Tailoring of the overlayer structure can be used for ultrathin film magnetic patterning.read more
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Journal ArticleDOI
Magnetization switching in ferromagnets by adsorbed chiral molecules without current or external magnetic field.
Oren Ben Dor,Shira Yochelis,Anna Radko,Kiran Vankayala,Eyal Capua,Amir Capua,See-Hun Yang,Lech T. Baczewski,Stuart S. P. Parkin,Stuart S. P. Parkin,Ron Naaman,Yossi Paltiel +11 more
TL;DR: This work demonstrates magnetization switching of ferromagnetic thin layers that is induced solely by adsorption of chiral molecules, and presents a simple low-power magnetization mechanism when operating at ambient conditions.
Journal ArticleDOI
Magnetic structure of films: Dependence on anisotropy and atomic morphology
P.J. Jensen,K.H. Bennemann +1 more
TL;DR: In this paper, a review of magnetic properties of different thin film systems is investigated as functions of the temperature and the atomic morphology, and the effect of collective magnetic excitations and the non-collinear magnetic structure is determined.
Journal ArticleDOI
Local light-induced magnetization using nanodots and chiral molecules.
TL;DR: This work achieves local spin-based magnetization generated optically at ambient temperatures using chiral molecules and nanocrystals, to lead to optically controlled spintronics logic devices that will enable low power consumption, high density, and cheap fabrication.
Journal ArticleDOI
Structure and order in cobalt/platinum-type nanoalloys: from thin films to supported clusters
TL;DR: In this article, an overview of the structural, morphological and chemical behaviors of CoPt-based supported nanoparticles in terms of phase diagrams (temperature, composition, size effect), kinetic behavior (growth, annealing, ordering), and environment effects (substrate, capping, matrix, gas) and of magnetic properties.
Journal ArticleDOI
Tuning the magnetic anisotropy of Co nanoparticles by metal capping
Fernando Luis,Fernando Bartolomé,Frédéric Petroff,Frédéric Petroff,José F. Bartolomé,Luis Miguel García,Cyrile Deranlot,Cyrile Deranlot,Henri Jaffrès,Henri Jaffrès,M. J. Martínez,Peter Bencok,Fabrice Wilhelm,Andrei Rogalev,N. B. Brookes +14 more
TL;DR: In this article, the magnetic anisotropy of Co clusters with diameters ranging from 1.1 nm to 4.5 nm was investigated and it was found that capping the clusters by a metallic (Cu and Au) layer significantly enhances the anisotropic properties.