Demonstrating Multi-bit Magnetic Memory in the Fe8 High Spin Molecule by Muon Spin Rotation

TL;DR

This paper demonstrates that the Fe8 high spin molecule can function as a multi-bit magnetic memory device, using muon spin rotation to detect discrete magnetic states and memory retention.

Contribution

The study introduces a novel muon spin rotation method to detect quantum states in high spin molecules, enabling multi-bit magnetic memory demonstration in Fe8.

Findings

Fe8 can remember 6-8 different magnetic states

Discrete states are used for information storage

Method paves the way for magnetic quantum tunneling detection

Abstract

We developed a method to detect the quantum nature of high spin molecules using muon spin rotation, and a three-step field cycle ending always with the same field. We use this method to demonstrate that the Fe8 molecule can remember 6 (possibly 8) different histories (bits). A wide range of fields can be used to write a particular bit, and the information is stored in discrete states. Therefore, Fe8 can be used as a model compound for Multi-bit Magnetic Memory. Our experiment also paves the way for magnetic quantum tunneling detection in films.