Epitaxial thin films of hexagonal BaRuO[sub 3] on (001) SrTiO[sub 3]

Lee, M. K.; Eom, C. B.; Lettieri, J.; Scrymgeour, I. W.; Schlom, D. G.; Tian, W.; Pan, X. Q.; Ryan, P. A.; Tsui, F.
January 2001
Applied Physics Letters;1/15/2001, Vol. 78 Issue 3, p329
Academic Journal
We report the growth, epitaxial arrangement, and electrical and magnetic properties of epitaxial thin films of hexagonal BaRuO[sub 3] on (001) cubic perovskite substrates. Four-circle x-ray diffraction reveals that the BaRuO[sub 3] films are predominantly grown with two distinct orientations normal to the (001) SrTiO[sub 3] substrate: (022¯3) of the four-layered hexagonal structure (4H) in the sputter-grown films and (202¯5) of the nine-layered hexagonal structure (9R) in the pulsed laser deposited films. (022¯3)-oriented 4H films consist of four orthogonal domains with the in-plane relationship of BaRuO[sub 3][21¯1¯0]//SrTiO[sub 3]<110>. The temperature dependent resistivity of the (022¯3) 4H film shows metallic behavior. In contrast, a resistivity minimum is observed at low temperatures in the (202¯5) 9R film. Both films exhibit Pauli paramagnetism. © 2001 American Institute of Physics.


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