Can I read Nanocriticality in the magnetic phase transition of CoO nanoparticles on EtoBox?

Nanocriticality in the magnetic phase transition of CoO nanoparticles by Machteld E. Kamminga; Jonas Okkels Birk; Jari í Hjøllum; Henrik Jacobsen; Jakob Lass; Thorbjørn L. Koch; Niels B. Christensen; Christof Niedermayer; Lukas Keller; Luise Theil Kuhn; Elisabeth T. Ulrikkeholm; Erik Brok; Cathrine Frandsen; Kim Lefmann is a Physics and Astronomy article available to read on EtoBox.

What is Nanocriticality in the magnetic phase transition of CoO nanoparticles about?

The universal theory of critical phase transitions describes the critical behavior at second-order phase transitions in infinitely large systems. With the increased contemporary interest in nanoscale materials, we investigated CoO nanoparticles by means of neutron scattering and found how the theory of critical phenomena breaks down in the nanoscale regime. Using CoO as a model system, we have identified a size-dependent nanocritical temperature region close to the antiferromagnetic phase transition where the magnetic correlation length of the nanoparticles converges to a constant value, which is significantly smaller than that of the saturated state found at low temperatures. This is in clear contrast to the divergence around T N observed for bulk systems. Our finding of nanocriticality in the magnetic phase transition is of great importance for the understanding of phase transitions at the nanoscale.

Who reads Nanocriticality in the magnetic phase transition of CoO nanoparticles?

Author

Machteld E. Kamminga; Jonas Okkels Birk; Jari í Hjøllum; Henrik Jacobsen; Jakob Lass; Thorbjørn L. Koch; Niels B. Christensen; Christof Niedermayer; Lukas Keller; Luise Theil Kuhn; Elisabeth T. Ulrikkeholm; Erik Brok; Cathrine Frandsen; Kim Lefmann

Publisher

American Physical Society (APS)

Published

2023

Language

EN

Field

Physics and Astronomy (Physical Sciences)