Crystal field and spectrum of Pr4+ in BaPrO3

Structural and Electrical Properties of BaPrO_3-<i>δ</i> Thin Film with Oxygen Vacancies

“…Shoto Furuichi 1) , Takashi Tsuchiya 2) , Koji Horiba 3) , Masaki Kobayashi 3) , Makoto Minohara 3) , Hiroshi Kumigashira 3) and Tohru Higuchi…”

“…Trivalent-lanthanide (Ln 3+ ) -doped BaPrO3 exhibits high proton conduction due to its strong basicity to favor proton incorporation as well as hole conduction by carrier between Pr 3+ and Pr 4+ upon carrier doping [1][2][3][4]. The proton and hole mixed conductor is expected for anode electrode of solid oxide fuel cell (SOFC), which operates at intermediate temperature region of 300 ~ 600 C [5][6][7][8][9][10][11][12].…”

Theoretical studies of the Spin Hamiltonian Parameters for the orthorhombic Pr4+ ion in SrCeO3 crystal

“…For a 4f 1 ion in orthorhombic symmetry, the ground 2 F 5/2 and excited 2 F 7/2 states is split into three and four Kramers doublets, respectively [2]. The basis function of the lowest doublet Γ γ can be obtained by diagonalizing the 14 × 14 energy matrix in orthorhombic symmetry based on the J-mixing between the 2 F 5/2 ground and 2 F 7/2 excited states via crystal-field interaction and the spin-orbit coupling interaction.…”

“…The mechanism for the strong superexchange interaction that gives rise to long-range magnetic ordering at relatively high temperatures in oxides containing tetravalent f-ions has yet to be fully understood [1,2]. Among the lanthanides, the trivalent oxidation state is the most stable, and it is of interest that only cerium, praseodymium, and terbium, that can be obtained in tetravalent state.…”

Hydrogen content in doped and undoped BaPrO3 and BaCeO3 by cold neutron prompt-gamma activation analysis

“…2,3 In addition, BaPrO 3 is unusual in its ability to host Pr primarily ͑if not entirely͒ in the 4 + oxidation state, and has therefore been of interest for its magnetic properties. [4][5][6][7][8][9] Measurement of hydrogen ͑or water͒ uptake in proton conducting perovskites has typically been carried out by thermogravimetric methods, 1 although in a limited number of cases other techniques have been employed. In an early example, the water solubility in yttria-stabilized zirconia ͑YSZ͒ has been determined from a measurement of the equilibrium water vapor pressure above the material, 10 whereas measurement of the integrated OH stretching band as determined from IR spectroscopy has been somewhat more recently employed in the case of strontium titanate.…”