Neutron scattering, a high-energy technique, serves as a formidable asset in spectroscopy, enabling scientists to delve into the intricate physical and chemical traits of diverse materials. One area where this technique shines is in the investigation of dense and intricate structures within lanthanide-iron intermetallic compounds, notably the renowned neodymium magnet. Despite its prowess, this method has yet to unlock the secrets of probing the magnetic essence of this material.

 

In a recent publication in The European Physical Journal Plus, Michael Kuz'min from Aix-Marseille University, in collaboration with Manuel Richter from Leibniz IFW Dresden, introduced an innovative correction to this neutron scattering technique. Their breakthrough proposes a means to unveil the elusive “exchange field” of neodymium, a pivotal marker of its magnetic character.

Unraveling the Enigma of Neodymium

This pioneering approach holds promise in unraveling the enigma behind the exceptional resistance of neodymium compounds to demagnetization, a trait crucial for their utility in permanent magnets indispensable for technologies like wind turbines, electric vehicles, and robotics.

 

The exchange field of a metal gauges the alignment degree between the quantum spins of adjacent atoms, intimately linked to its magnetic strength. Pinpointing this field involves measuring the disparity between two significant parameters.

 

Firstly, it involves assessing the transition energy required for the orbital movement of electrons between “multiplets,” which are closely spaced energy levels tied to the electronic structures of neodymium atoms. Secondly, it entails scrutinizing the spin-orbit splitting that elucidates the interplay between electrons' spin and their orbit around atoms.

The Crux of the Challenge

The crux of the challenge in measuring the neodymium exchange field lies in the impact of electric fields stemming from the ion arrangement encircling neodymium atoms in the crystal lattice. This interference disrupts the interactions between the orbiting electrons, affecting both of the aforementioned critical parameters.

 

Kuz'min and Richter's study introduces a novel suite of formulas tailored to rectify this electric field's influence. These corrections, when applied to their observations, pave the way for future experiments. They aim to provide a clearer avenue for researchers to delve into and harness the magnetic properties of this metal using neutron spectroscopy, potentially unlocking new realms of understanding and application.

Apex Magnets

At Apex Magnets, we’re thrilled by the groundbreaking strides in understanding neodymium compounds’ magnetic essence. We eagerly anticipate — and can’t wait to share with you — future innovations and discoveries that arise from this newfound understanding. To read about other exciting magnetic breakthroughs, browse our blog. If you’re looking to shop for magnets, start here!