MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Pressure-Induced Metal-Insulator Transition in the Itinerant Antiferromagnet Nb12−xTixO29 (x=0 and 0.2)
Takashi NakaTakayuki NakaneYuji FurukawaTadafumi AdschiriAkiyuki Matsushita
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2006 Volume 47 Issue 3 Pages 501-503

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Abstract

We have carried out resistivity measurements on itinerant antiferromagnets Nb12−xTixO29 (x=0 and 0.2) under pressure up to 2.5 GPa in order to investigate the pressure effects on these novel magnetic and metallic behaviors. The resistivity-temperature curves for both systems show metallic behavior at lower pressure, while the resistivity increases with decreasing temperature at higher pressure. These results indicate that a metal-insulator transition is induced by the application of the pressure in both systems. We will discuss the origin of the metal-insulator transition in terms of charge ordering and pressure-induced amorphization as have been suggested in other niobium oxides.

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© 2006 The Japan Institute of Metals and Materials
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