Engineering atomic-scale magnetic fields by dysprosium single atom magnets

Superlattice of Single Atom Magnets on Graphene.

Regular arrays of single atoms with stable magnetization represent the ultimate limit of ultrahigh density storage media. Here we report a self-assembled superlattice of individual and noninteracting Dy atoms on graphene grown on Ir(111), with magnetic hysteresis up to 5.6 T and spin lifetime of 1000 s at 2.5 K. The observed magnetic stability is a consequence of the intrinsic low electron and ...

Designing magnets with prescribed magnetic fields

We present a novel design method capable of finding the magnetization densities that generate prescribed magnetic fields. The method is based on the solution to a simple variational inequality and the resulting designs have simple piecewiseconstant magnetization densities. By this method we obtain new designs of magnets that generate commonly used magnetic fields: uniform magnetic fields, self-...

Single-Atom Transistors and Atomic-Scale Quantum Point Contacts by Electrochemical Deposition

Magnetic relaxation in dysprosium-dysprosium collisions

Citation Newman, Bonna Kay et al. "Magnetic relaxation in dysprosium-dysprosium collisions. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. The collisional magneti...

Interlayer Exchange Coupling: A General Scheme Turning Chiral Magnets into Magnetic Multilayers Carrying Atomic-Scale Skyrmions.

We report on a general principle using interlayer exchange coupling to extend the regime of chiral magnetic films in which stable or metastable magnetic Skyrmions can appear at a zero magnetic field. We verify this concept on the basis of a first-principles model for a Mn monolayer on a W(001) substrate, a prototype chiral magnet for which the atomic-scale magnetic texture is determined by the ...