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• W4207078156 abstract "The ground state of Co 2+ in the octahedral CoO 6 crystal field has often been assumed to be in high spin state with S = 3 / 2 . As a result, the effective magnetic moments of Co 2+ are overestimated in Co(OH) (2− x ) F x . Herein, it is argued that the ground state of Co 2+ in Co(OH) (2− x ) F x has effective spin 1 / 2 but not S = 3 / 2 , due to spin–orbit coupling in distorted octahedral crystal field. Analysis of the published magnetic susceptibility (χ) data on three samples of Co(OH) (2− x ) F x is reported here with the new result that the Néel temperature T N decreases with an increase in χ as T N = 36.5, 30.5, and 26.5 K are determined for x = 1.09, 1.14, and 1.26, respectively. The employment of modified Curie–Weiss (CW) law along with S = 1 / 2 ground state eliminates the reported disagreement between the magnetic moment μ(Co 2+ ) obtained from CW law above and neutron powder diffraction (NPD) below The fits of the data to the predictions of the linear chain model yield the exchange constant J / k B = −30.5, −28.1, and −24.7 K for x = 1.09, 1.14, and 1.26, respectively, supporting the chain‐like antiferromagnetic ordering observed using NPD." @default.
• W4207078156 created "2022-01-26" @default.
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• W4207078156 date "2022-02-04" @default.
• W4207078156 modified "2023-10-17" @default.
• W4207078156 title "Magnetic Ground State and Tunable Néel Temperature in the Spin ½ Linear Chain Antiferromagnet Co(OH)_{(2−<i>x</i>)}F_<i>x</i>" @default.
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• W4207078156 doi "https://doi.org/10.1002/pssb.202100438" @default.
• W4207078156 hasPublicationYear "2022" @default.
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