Y Yamato et al 2009 J. Phys.: Condens. Matter 21 486001 doi:10.1088/0953-8984/21/48/486001
Y Yamato1, M Matsukawa1, S Nimori2, R Suryanarayanan3, Y Murano1, Y Nakanishi1, M Apostu4, A Revcolevschi3, K Koyama5 and N Kobayashi5
Show affiliationsWe have studied the effect of pressure on the anomalous lattice striction, both in the ab-plane and along the c-axis, of (La,Pr)1.2Sr1.8Mn2O7 single crystals over the temperature region where the paramagnetic insulator to ferromagnetic metal transition takes place. We have examined the temperature dependence of the resistivity and the magnetization under applied pressure. The chemical pressure effect due to Pr-substitution at the La site suppresses the transition temperature of the parent crystal, while the application of external pressure on Pr-substituted crystals enhances the double exchange driven metallic state, resulting in a stable rise of Tc.
75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
62.50.-p High-pressure effects in solids and liquids
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
75.47.Gk Colossal magnetoresistance
71.30.+h Metal-insulator transitions and other electronic transitions
Issue 48 (2 December 2009)
Received 7 September 2009, in final form 9 October 2009
Published 30 October 2009
Y Yamato et al 2009 J. Phys.: Condens. Matter 21 486001
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