ISIS Neutron and Muon Source Data Journal

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

Abstract: 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.

Principal Investigator: Professor Takehito Nakano
Experimenter: Mr Takashi Umemoto
Experimenter: Professor Takashi Kamiyama
Experimenter: Dr Pascal Manuel
Experimenter: Mr Gayan Prasad Hettiarachchi

DOI: 10.5286/ISIS.E.RB1510116

ISIS Experiment Number: RB1510116

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor Takehito Nakano et al; (2015): Neutron diffraction study on ferromagnetism of potassium nanoclusters arrayed in zeolite crystal, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1510116

Data is released under the CC-BY-4.0 license.