scholarly journals The role of B-site cations on proton conductivity in double perovskite oxides La2MgTiO6 and La2MgZrO6

2012 ◽  
Vol 37 (9) ◽  
pp. 7983-7994 ◽  
Author(s):  
Camilla K. Vigen ◽  
Tor Svendsen Bjørheim ◽  
Reidar Haugsrud
Keyword(s):  
Proton Conductivity ◽  
Double Perovskite ◽  
Perovskite Oxides

scholarly journals Spontaneous atomic ordering and magnetism in epitaxially stabilized double-perovskites

2012 ◽  
Vol 1454 ◽  
pp. 3-13
Author(s):  
Akira Ohtomo ◽  
Suvankar Chakraverty ◽  
Hisanori Mashiko ◽  
Takayoshi Oshima ◽  
Masashi Kawasaki
Keyword(s):  
Magnetic Properties ◽  
Transition Metals ◽  
Double Perovskite ◽  
Perovskite Oxides ◽  
Epitaxial Films ◽  
Atomic Ordering ◽  
Magnetic Ground State ◽  
Half Metallic ◽  
Optical Band Gaps

ABSTRACTWe report on the atomic ordering of B-site transition-metals and magnetic properties in double-perovskite oxides, La2CrFeO6 (LCFO) and La2VMnO6 (LVMO), which have never been reported to exist in ordered forms. These double-perovskite oxides are particularly interesting because of possible ferromagnetism (expected from the Kanamori-Goodenough rule for LCFO) and half-metallic antiferromagnetism (predicted for LVMO). Using pulsed-laser deposition technique with single solid-solution targets, we have prepared epitaxial films in ordered forms. Despite similar ionic characters of constituent transition-metals in each compound, the maximum B-site order attained was surprisingly high, ∼90% for LCFO and ∼80% for LVMO, suggesting a significant role of epitaxial stabilization in the spontaneous ordering process. Magnetization and valence state characterizations revealed that the magnetic ground state of both compounds was coincidently ferrimagnetic with saturation magnetization of ∼2μBper formula unit, unlike those predicted theoretically. In addition, they were found to be insulating with optical band-gaps of 1.6 eV and 0.9 eV for LCFO and LVMO, respectively. Our results present a wide opportunity to explore novel magnetic properties of binary transition-metal perovskites upon epitaxial stabilization of the ordered phase.

The role of A-site cation size mismatch in tune the catalytic activity and durability of double perovskite oxides

2020 ◽  
Vol 270 ◽  
pp. 118868 ◽  
Author(s):  
Shengli Pang ◽  
Jie Xu ◽  
Yanjing Su ◽  
Gongmei Yang ◽  
Meng Zhu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Double Perovskite ◽  
Perovskite Oxides ◽  
Size Mismatch ◽  
A Site ◽  
Cation Size

Investigation into Cation-Ordered Magnetic Polar Double Perovskite Oxides

2021 ◽  
Vol 33 (5) ◽  
pp. 1594-1606
Author(s):  
Monirul Shaikh ◽  
Aafreen Fathima ◽  
M. J. Swamynadhan ◽  
Hena Das ◽  
Saurabh Ghosh
Keyword(s):  
Double Perovskite ◽  
Perovskite Oxides

scholarly journals Tunable magnetization steps in mixed valent ferromagnet Eu2CoMnO6

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Nara Lee ◽  
Jong Hyuk Kim ◽  
Dong Gun Oh ◽  
Hyun Jun Shin ◽  
Hwan Young Choi ◽  
...  
Keyword(s):  
Material Processing ◽  
Magnetic Properties ◽  
Single Crystals ◽  
Magnetic State ◽  
Hysteresis Loops ◽  
Double Perovskite ◽  
Processing Parameters ◽  
Perovskite Oxides ◽  
Efficient Approach ◽  
Isothermal Magnetization

AbstractMagnetic properties can be manipulated to enhance certain functionalities by tuning different material processing parameters. Here, we present the controllable magnetization steps of hysteresis loops in double-perovskite single crystals of Eu2CoMnO6. Ferromagnetic order emerges below TC ≈ 122 K along the crystallographic c axis. The difficulty in altering Co2+ and Mn4+ ions naturally induces additional antiferromagnetic clusters in this system. Annealing the crystals in different gas environments modifies the mixed magnetic state, and results in the retardation (after O2-annealing) and bifurcation (after Ar-annealing) of the magnetization steps of isothermal magnetization. This remarkable variation offers an efficient approach for improving the magnetic properties of double-perovskite oxides.

ChemInform Abstract: High-Pressure Synthesis, Crystal Structures, and Magnetic Properties of 5d Double-Perovskite Oxides Ca2MgOsO6and Sr2MgOsO6.

ChemInform ◽  
2015 ◽  
Vol 46 (24) ◽  
pp. no-no
Author(s):  
Yahua Yuan ◽  
Hai L. Feng ◽  
Madhav Prasad Ghimire ◽  
Yoshitaka Matsushita ◽  
Yoshihiro Tsujimoto ◽  
...  
Keyword(s):  
High Pressure ◽  
Magnetic Properties ◽  
Crystal Structures ◽  
Double Perovskite ◽  
Perovskite Oxides ◽  
High Pressure Synthesis ◽  
Pressure Synthesis

scholarly journals Magnetic and Dielectric Behavior of the Ruthenium Double Perovskite Oxides R2MRuO6 (R=La, Pr and Nd, M=Mg, Co, Ni and Zn)

2007 ◽  
Vol 32 (1) ◽  
pp. 51-54
Author(s):  
Kenji Yoshii ◽  
Naoshi. Ikeda ◽  
Shigeo Mori ◽  
Yasuhiro Yoneda ◽  
Masaichiro Mizumaki ◽  
...  
Keyword(s):  
Double Perovskite ◽  
Perovskite Oxides ◽  
Dielectric Behavior

Photoemission spectroscopy and x-ray absorption spectroscopy studies of double perovskite oxides: Ba2−xLaxFeMoO6

2004 ◽  
Vol 16 (48) ◽  
pp. S5685-S5688 ◽  
Author(s):  
J-S Kang ◽  
S C Wi ◽  
S S Lee ◽  
G Kim ◽  
H M Yang ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Double Perovskite ◽  
Perovskite Oxides ◽  
Photoemission Spectroscopy ◽  
X Ray ◽  
Spectroscopy Studies ◽  
X Ray Absorption

High temperature induced phase transitions in Sr2ZnWO6 and Sr2CoWO6 double perovskite oxides: Raman spectroscopy as a tool

2012 ◽  
Vol 1029 ◽  
pp. 81-85 ◽  
Author(s):  
Bouchaib Manoun ◽  
Josu M. Igartua ◽  
Peter Lazor ◽  
Amine Ezzahi
Keyword(s):  
Raman Spectroscopy ◽  
Phase Transitions ◽  
High Temperature ◽  
Double Perovskite ◽  
Perovskite Oxides

Highly conductive double perovskite oxides A2LuTaO6 (A = Ba, Sr, Ca) as promising photoanode material for dye sensitized solar cells

2020 ◽  
Vol 276 ◽  
pp. 128220
Author(s):  
Md Sariful Sheikh ◽  
Anurag Roy ◽  
Shubhranshu Bhandari ◽  
Tapas K Mallick ◽  
Senthilarasu Sundaram ◽  
...  
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Double Perovskite ◽  
Perovskite Oxides ◽  
Dye Sensitized ◽  
Sensitized Solar Cells
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