Browsing Kjemisk institutt by Author "Yamauchi, H"

Now showing items 1-3 of 3

  • Isovalent-substitution effect on the Verwey-type transition in the A-site-ordered double perovskite (Ba,Sr)RFe2O5 
    Nakamura, J; Karppinen, M; Karen, Pavel; Linden, J; Yamauchi, H (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2004)
    Two types of chemical-pressure effects on the Verwey-type transition in Ba Sm Fe 2 O 5 are studied, viz., ionic-size contractions at the Ba and Sm sites. Whereas the replacement of Sm by the smaller Eu and Gd atoms increases ...
  • Pressure effects on the charge-ordering transition of BaYCo2O5.0 
    Moritomo, Y; Hanawa, M; Xu, S; Ishikawa, H; Ohishi, Y; Kato, K; Honma, T; Karen, Pavel; Karppinen, M; Yamauchi, H (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2004)
    Pressure effects on the charge-ordering (CO) transition have been investigated for an oxygen-deficient double-perovskite cobalt oxide, BaYCo 2 O 5.0 , through resistivity measurements using a piston-cylinder-type clamp ...
  • Transport and magnetotransport properties across the two-step Verwey transition in BaGdFe2O5+w 
    Linden, J; Karen, Pavel; Nakamura, J; Karppinen, M; Yamauchi, H (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2006)
    Magnetoresistance, electrical transport, and magnetic properties associated with a two-step Verwey-type transition in BaGdFe 2 O 5 + w (− 0.015 < w < 0.181 ) are studied as a function of temperature and oxygen nonstoichiometry ...