skip to content

Winton Programme for the Physics of Sustainability

Department of Physics

Prof Andrew Ferguson and Dr Chiara Ciccarelli (Microelectronics)

Until now, commercial magnetic memory designs have relied exclusively on ferromagnetic units, with the bits “0” and “1” being encoded in their magnetisation orientation (see top figure). Ferromagnets, however, possess an innate limitation in terms of down-scaling and operating speed. The pressing task of improving performances has led to a growing interest in alternative materials, such as anti-ferromagnets.

Anti-ferromagnets are magnetic materials that contain within them oppositely aligned and inseparable magnetic moments, resulting in an overall zero magnetisation. This characteristic makes them more stable against miniaturisation. Moreover, the switching of the magnetic moments is 1000 times faster, potentially making data recording 1000 faster.

Having zero net magnetisation, anti-ferromganets are unresponsive to magnetic fields and we must rely on electricity to both read and write the magnetic order within them. In this project we will investigate how efficiently electrical currents perturb the anti-ferromagnetic ordering and can therefore be used to switch between different states of an anti-ferromagnetic memory cell (see bottom figure). We will also study different layouts to convert anti-ferromagnetic dynamics into an easily accessible electrical signal. 

Andrew Ferguson Pump Prime

Winton Annual Report 2019

Latest news

Manipulation of Quantum Entangled Triplet Pairs

7 January 2021

Researchers have uncovered a new technique to create and manipulate pairs of particle-like excitations in organic semiconductors that carry non-classical spin information across space, much like the entangled photon pairs in the famous Einstein-Podolsky-Roden “paradox”.

Machine learning algorithm helps in the search for new drugs

20 March 2019

Researchers have designed a machine learning algorithm for drug discovery which has been shown to be twice as efficient as the industry standard.