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Filename: controllers/Detail.php
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The static and dynamic magnetic properties and the specific heat of KNiTeO and LiNiTeO were examined and it was found that they undergo a long-range ordering at = 22.8 and 24.4 K, respectively, but exhibit a strong short-range order. At high temperature, the magnetic susceptibilities of KNiTeO and LiNiTeO are described by a Curie-Weiss law, with Curie-Weiss temperatures Θ of approximately -13 and -20 K, respectively, leading to the effective magnetic moment of about 4.46 ± 0.01 per formula unit, as expected for Ni ( = 1) ions. In the paramagnetic region, the ESR spectra of KNiTeO and LiNiTeO show a single Lorentzian-shaped line characterized by the isotropic effective -factor, = 2.19 ± 0.01. The energy-mapping analysis shows that the honeycomb layers of ANiTeO (A = K, Li) and LiNiSbO adopt a zigzag order, in which zigzag ferromagnetic chains are antiferromagnetically coupled, because the third nearest-neighbor spin exchanges are strongly antiferromagnetic while the first nearest-neighbor spin exchanges are strongly ferromagnetic, and that adjacent zigzag-ordered honeycomb layers prefer to be ferromagnetically coupled. The short-range order of the zigzag-ordered honeycomb lattices of KNiTeO and LiNiTeO is equivalent to that of an antiferromagnetic uniform chain, and is related to the short-range order of the ferromagnetic chains along the direction perpendicular to the chains.
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Source |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8999558 | PMC |
http://dx.doi.org/10.3390/ma15072563 | DOI Listing |
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