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Crystal Refinement and Magnetic Structure of KNi 4 (PO 4 ) 3 : A Novel Example of Three Interacting Magnetic Sub‐Lattices
Author(s) -
López MaríaLuisa,
Durio Cristina,
Daidouh Abdelaali,
Pico Carlos,
Veiga MaríaLuisa
Publication year - 2004
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200305164
Subject(s) - magnetization , antiferromagnetism , ferromagnetism , magnetism , condensed matter physics , neutron diffraction , materials science , magnetic structure , remanence , magnetic susceptibility , crystal structure , crystallography , nuclear magnetic resonance , magnetic field , chemistry , physics , quantum mechanics
Abstract KNi 4 (PO 4 ) 3 has been synthesised following a method previously reported by some of us and studied on the basis of magnetization and neutron powder diffraction (NPD) data. Magnetization measurements suggest the coexistence of ferromagnetic (FM) and antiferromagnetic (AFM) interactions: magnetization versus magnetic field curves present a remanent magnetization of around 2.15 μ B at T =2 K. The magnetic structure of the KNi 4 (PO 4 ) 3 has been determined at low temperature from the NPD data. These measurements show that there are three magnetic sub‐lattices of Ni 2+ ions, which interact through common oxygen or phosphate groups, giving rise to FM and AFM couplings. The resulting interactions are FM in nature. Such a complex behaviour could provide an interesting model to analyse magnetic interactions in more condensed systems, such in mixed metal oxides.