Neutron diffraction study on ferromagnetism of potassium nanoclusters arrayed in zeolite crystal

DOI

Zeolites are porous crystals that make it possible to generate regularly arrayed alkali-metal nanoclusters. Potassium clusters arrayed in zeolite A show ferromagnetism below 7 K without any magnetic elements. This is a novel magnetic material because the magnetic order is realized by exchange interactions between s-electrons of alkali metals. Because of the small ferromagnetic moment (0.3 muB per cluster) and an antiferromagnetic interaction observed in magnetization measurements, the system is not regarded as a simple ferromagnet. Although a spin-canted antiferromagnetic model and a ferrimagnetic model have been proposed, it has not been clarified experimentally yet. It is scientifically significant to clarify the reason why the s-electron system can show ferromagnetism. In this work we approach this issue by directly solving the magnetic structure using neutron diffraction.

Identifier
DOI https://doi.org/10.5286/ISIS.E.58451930
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/58451930
Provenance
Creator Mr Takashi Umemoto; Professor Takehito Nakano; Professor Takashi Kamiyama; Dr Pascal Manuel; Mr Gayan Prasad Hettiarachchi
Publisher ISIS Neutron and Muon Source
Publication Year 2018
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Natural Sciences; Physics
Temporal Coverage Begin 2015-04-09T08:00:00Z
Temporal Coverage End 2015-04-11T08:00:00Z