Spin-frustrated pyrochlore chains in the volcanic mineral kamchatkite (KCu3OCl(SO4)2)

Search of new frustrated magnetic systems is of a significant importance for physics studying the condensed matter. The platform for geometric frustration of magnetic systems can be provided by copper oxocentric tetrahedra (OCu 4 ) forming the base of crystalline structures of copper minerals from T...

Full description

Saved in:
Bibliographic Details
Published in:Physics and chemistry of minerals 2018-07, Vol.45 (7), p.655-668
Main Authors: Volkova, L. M., Marinin, D. V.
Format: Article
Language:English
Subjects:
Antiferromagnetism
Chains
Chemistry
Copper
Couplings
Crystal structure
Crystallography and Scattering Methods
Earth and Environmental Science
Earth Sciences
Electric polarization
Geochemistry
Jahn-Teller effect
Mineral Resources
Mineralogy
Minerals
Original Paper
Physics
Pyrochlores
Tetrahedra
Volcanic activity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Search of new frustrated magnetic systems is of a significant importance for physics studying the condensed matter. The platform for geometric frustration of magnetic systems can be provided by copper oxocentric tetrahedra (OCu 4 ) forming the base of crystalline structures of copper minerals from Tolbachik volcanos in Kamchatka. The present work was devoted to a new frustrated antiferromagnetic—kamchatkite (KCu 3 OCl(SO 4 ) 2 ). The calculation of the sign and strength of magnetic couplings in KCu 3 OCl(SO 4 ) 2 has been performed on the basis of structural data by the phenomenological crystal chemistry method with taking into account corrections on the Jahn–Teller orbital degeneracy of Cu 2+ . It has been established that kamchatkite (KCu 3 OCl(SO 4 ) 2 ) contains AFM spin-frustrated chains of the pyrochlore type composed of cone-sharing Cu 4 tetrahedra. Strong AFM intrachain and interchain couplings compete with each other. Frustration of magnetic couplings in tetrahedral chains is combined with the presence of electric polarization.
ISSN:0342-1791
1432-2021
DOI:10.1007/s00269-018-0950-5