Substitution effects on the structural and magnetic behaviour of Na0.63CoO2

T Zhou; Dou Zhang; Timothy Button; Frank Berry; Colin Greaves

doi:10.1039/b907187c

Substitution effects on the structural and magnetic behaviour of Na0.63CoO2

T Zhou, Dou Zhang, Timothy Button, Frank Berry, Colin Greaves

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Abstract

This paper discusses the effects of cation substitutions on the structural ( and linked electronic) transition which has been observed in Na0.63CoO2. The effects of the following substitutions are reported: Ca on the Na site; Fe and Ni on the Co site. Ca doping suppresses the transition and is suggested to interfere with the Na ordering and hence causes a variation in the electronic structure. Fe and Ni doped samples all show transitions, but the transition temperature decreases with the dopant cation concentration. This implies that the replacement of Co by Fe and Ni may enhance the instability in the low-temperature regime. The influence of the substitution is also reflected in the structure and magnetic behaviour of the doped samples.

Original language	English
Pages (from-to)	1089-1094
Number of pages	6
Journal	Dalton Transactions
Volume	39
Issue number	4
DOIs	https://doi.org/10.1039/b907187c
Publication status	Published - 1 Jan 2010

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abstract = "This paper discusses the effects of cation substitutions on the structural ( and linked electronic) transition which has been observed in Na0.63CoO2. The effects of the following substitutions are reported: Ca on the Na site; Fe and Ni on the Co site. Ca doping suppresses the transition and is suggested to interfere with the Na ordering and hence causes a variation in the electronic structure. Fe and Ni doped samples all show transitions, but the transition temperature decreases with the dopant cation concentration. This implies that the replacement of Co by Fe and Ni may enhance the instability in the low-temperature regime. The influence of the substitution is also reflected in the structure and magnetic behaviour of the doped samples.",

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AU - Zhou, T

AU - Zhang, Dou

AU - Button, Timothy

AU - Berry, Frank

AU - Greaves, Colin

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N2 - This paper discusses the effects of cation substitutions on the structural ( and linked electronic) transition which has been observed in Na0.63CoO2. The effects of the following substitutions are reported: Ca on the Na site; Fe and Ni on the Co site. Ca doping suppresses the transition and is suggested to interfere with the Na ordering and hence causes a variation in the electronic structure. Fe and Ni doped samples all show transitions, but the transition temperature decreases with the dopant cation concentration. This implies that the replacement of Co by Fe and Ni may enhance the instability in the low-temperature regime. The influence of the substitution is also reflected in the structure and magnetic behaviour of the doped samples.

AB - This paper discusses the effects of cation substitutions on the structural ( and linked electronic) transition which has been observed in Na0.63CoO2. The effects of the following substitutions are reported: Ca on the Na site; Fe and Ni on the Co site. Ca doping suppresses the transition and is suggested to interfere with the Na ordering and hence causes a variation in the electronic structure. Fe and Ni doped samples all show transitions, but the transition temperature decreases with the dopant cation concentration. This implies that the replacement of Co by Fe and Ni may enhance the instability in the low-temperature regime. The influence of the substitution is also reflected in the structure and magnetic behaviour of the doped samples.

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DO - 10.1039/b907187c

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SN - 1477-9234

VL - 39

SP - 1089

EP - 1094

JO - Dalton Transactions

JF - Dalton Transactions

IS - 4

ER -

Substitution effects on the structural and magnetic behaviour of Na0.63CoO2

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