Stable two-dimensional ferromagnets made of regular single-layered lattices of single-molecule nanomagnets on substrates

TL;DR

This paper demonstrates that stable two-dimensional ferromagnets can be constructed from single-layer lattices of single-molecule nanomagnets with sufficient anisotropy, showing potential for information storage applications.

Contribution

It introduces a method to create stable 2D ferromagnets using nanomagnet lattices with controlled interactions and anisotropy, supported by Monte Carlo simulations.

Findings

Stable 2D ferromagnets are thermodynamically stable with strong anisotropy.

Curie temperature varies up to 15 K depending on inter-nanomagnet coupling.

Potential for experimental realization and information technology applications.

Abstract

We propose that stable two-dimensional (2D) ferromagnets can be made of regular single-layered lattices of single-molecule nanomagnets with enough uniaxial magnetic anisotropy on appropriate substrates by controlling the inter-nanomagnet magnetic interaction. Our Monte Carlo simulated results show that such ideal 2D ferromagnets are thermodynamically stable when the anisotropy is strong enough. If the anisotropy energy equals 80 K, approximately that of the Mn12, the T_c varies from zero to 15 K depending on different inter-nanomagnet coupling constants. Such stable spin systems, experimentally accessible, should be promising for information applications.