Enhanced Magnetic Anisotropy of Mn12-acetate

TL;DR

This study demonstrates the fabrication of homogeneous Mn12-acetate thin films with enhanced magnetic anisotropy, showing increased blocking temperature and improved magnetic properties suitable for potential applications.

Contribution

The paper introduces a simple Dip-and-Dry method to produce uniform Mn12-acetate films with significantly improved magnetic anisotropy compared to previous forms.

Findings

Blocking temperature increased to over 10 K at low fields

Homogeneous thin films with molecular-level smoothness achieved

Enhanced magnetic anisotropy observed in the films

Abstract

Thin films of the Single Molecule Magnet (Mn12-acetate) have been fabricated on a Si-substrate by the Dip-and-Dry method, a simple and robust technique. Atomic force microscopy and X-ray photoelectron spectroscopy characterizations reveal that homogeneous, thin films of a few molecular layers with smoothness at the molecular level are deposited. Significant changes in magnetic properties of Mn12-acetate exposed to the same solvent were observed in zero-field-cooled and field-cooled magnetization, as well as ac-susceptibility measurements. The blocking temperature was found to increase to TB > 10 K at low magnetic fields, indicating an enhanced magnetic anisotropy.