2004/01/21 by M. Kriener, Carsten Zobel, C. Zobel +9 · 3 citations
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Analytical Chemistry (journal) #Chemistry #Condensed matter physics #Doping #Electrical resistivity and conductivity #Ion #Ionic bonding #Ionic conductivity #Ionic radius #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetization #Materials science #Mineralogy #Physical chemistry #Physics #Physics of Superconductivity and Magnetism #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.69.094417
published as Phys. Rev. B 69, 094417 (2004) · 8 pages including 6 figures; accepted in Phys. Rev. B
arxiv created 2004/01/21 · openalex publication_date 2004/03/18 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present an investigation of the influence of structural distortions in charge-carrier doped La_1\ensuremath-xMxCoO3 by substituting La3+ with alkaline-earth metals of strongly different ionic sizes, that is, M=Ca2+, Sr2+, and Ba2+, respectively. We find that both the magnetic properties and the resistivity change nonmonotonically as a function of the ionic size of M. Doping La_1\ensuremath-xMxCoO3 with M=Sr2+ yields higher transition temperatures to the ferromagnetically ordered states and lower resistivities than doping with either Ca2+ or Ba2+ having a smaller or larger ionic size than Sr2+, respectively. From this observation we conclude that the different transition temperatures and resistivities of La_1\ensuremath-xMxCoO3 for different M (of the same concentration x) do not only depend on the varying chemical pressures. The local disorder due to the different ionic sizes of La3+ and M2+ plays an important role, too.