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Ruthenium-oxide compounds :Synthesis and structure-property relationships.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Ruthenium-oxide compounds :
其他題名:	Synthesis and structure-property relationships.
作者:	Haas, Mary Kathryn.
面頁冊數:	158 p.
附註:	Adviser: Robert J. Cava.
附註:	Source: Dissertation Abstracts International, Volume: 64-02, Section: B, page: 0706.
Contained By:	Dissertation Abstracts International64-02B.
標題:	Chemistry, Inorganic.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3080850
ISBN:	0496287249

Ruthenium-oxide compounds :Synthesis and structure-property relationships.
Haas, Mary Kathryn.

Ruthenium-oxide compounds :Synthesis and structure-property relationships. [electronic resource] - 158 p.

Adviser: Robert J. Cava.

Thesis (Ph.D.)--Princeton University, 2003.

Another intriguing structure-property relationship in oxides is the effect of metal-metal bonding. In the compound La4Ru6O 19, the Ru-Ru distance is 2.49 A (indicative of metal-metal bonding) and the physical property behavior is strongly influenced by the resulting localized electronic correlations. We report synthesis and characterization of another compound based on the same structure type, Bi3Ru 3O11, which has an Ru-Ru distance of 2.61 A. Specific heat, transport measurements, and electronic band structure calculations indicate that the difference in Ru-Ru bond length causes a cross-over from heavy-Fermion-type Fermi-liquid behavior in Bi3Ru3O11 to non-Fermi-liquid behavior in La4Ru6O19.

ISBN: 0496287249Subjects--Topical Terms:

197298
Chemistry, Inorganic.

Ruthenium-oxide compounds :Synthesis and structure-property relationships.
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500 $a Source: Dissertation Abstracts International, Volume: 64-02, Section: B, page: 0706.
502 $a Thesis (Ph.D.)--Princeton University, 2003.
520 # $a Another intriguing structure-property relationship in oxides is the effect of metal-metal bonding. In the compound La4Ru6O 19, the Ru-Ru distance is 2.49 A (indicative of metal-metal bonding) and the physical property behavior is strongly influenced by the resulting localized electronic correlations. We report synthesis and characterization of another compound based on the same structure type, Bi3Ru 3O11, which has an Ru-Ru distance of 2.61 A. Specific heat, transport measurements, and electronic band structure calculations indicate that the difference in Ru-Ru bond length causes a cross-over from heavy-Fermion-type Fermi-liquid behavior in Bi3Ru3O11 to non-Fermi-liquid behavior in La4Ru6O19.
520 # $a As much previously reported work concerning ruthenates focuses on the perovskite structure, we investigate another common oxide structure, the pyrochlore. Synthesis, physical property characterization, and electronic band structure calculations are reported for the substituted-pyrochlore series Bi2-x MxRu2O7, for M=Cu,Ni,Co,Mn,Fe. We find that while the ruthenate perovskites are poised at a critical point between ferromagnetic and nonmagnetic ground states, Bi2Ru2O 7 is robustly paramagnetic. The origin for this difference is described in terms of the differing crystal-field environments and electronic structures of the two compounds.
520 # $a Perovskite-based ruthenates display such properties as superconductivity in Sr2RuO4 and quantum critical magnetism in Sr 3Ru2O7. Additionally, the intrinsic properties of these materials are notably sensitive to impurity concentration. For these reasons, there is a demand for high quality single crystals of perovskite-based ruthenates for use in further characterization experiments. This thesis includes single crystal growth of Sr2RuO4, Sr2-xLa xRuO4, and Sr3Ru2O7 by the floating-zone method; a specialized crystal growth technique resulting in low impurity concentration and high structural regularity.
520 # $a Understanding complex structure-property relationships in transition-metal oxide compounds is an important goal in solid-state physics. Ruthenium-oxide compounds, specifically, are of great interest due to the range of magnetic and strongly correlated electronic behavior they exhibit; often breaching the limits of current condensed-matter theory.
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650 # 0 $a Chemistry, Inorganic. $3 197298
650 # 0 $a Physics, Condensed Matter. $3 226939
650 # 0 $a Engineering, Materials Science. $3 226940
710 0 # $a Princeton University. $3 212488
773 0 # $g 64-02B. $t Dissertation Abstracts International
790 $a 0181
790 1 0 $a Cava, Robert J., $e advisor
791 $a Ph.D.
792 $a 2003
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