Chemistry of noble metal oxides. I. Syntheses and properties of ABO2 delafossite compounds

Shannon, R. D.; Rogers, Donald B.; Prewitt, C. T.

doi:10.1021/ic50098a011

Cited by 491 publications

(395 citation statements)

References 2 publications

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“…3, the unit cell parameters present an important increases and monotonously with Sc substitution. They exhibit a larger variations compared with pure CuFeO 2 [22], in agreement with ionic radii for sixfold coordination Fe 3+ and Sc 3+ (rFe 3+ = 0.64Å; rSc 3+ = 0.72Å) [23]. The variation of the cell parameter c (from 17.0902(4)Å for x = 0.00 to 17.0717(4)Å for x = 0.25) is twice greater than those reported in [24] for the CuFe 1−x Rh x O 2 .…”

Section: Structural Propertiessupporting

confidence: 57%

Effect of Spin Dilution on the Magnetic State of Delafossite CuFeO2 with an S = 5/2 Antiferromagnetic Triangular Sublattice

Elkhoun

Amami

Hlil

et al. 2015

J Supercond Nov Magn

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This work describes the scandium doping effect on the structural and magnetic properties of delafossite-type oxides CuCr 1−x Sc x O 2 . The lattice parameters were found to vary according to Vegard's low. A reflection broadening is observed that is ascribed to local lattice distortion due to the ionic radius difference between Fe 3+ and Sc 3+ . Magnetic susceptibility measurements show that the dominant interactions are antiferromagnetic (AFM) but that doping induces significant changes. A rather monotonous T N2 decrease as x increases, from T N2 = 9.1 K down to T N2 = 5.9 K for x = 0.00 to 0.25, respectively, but T N1 remains almost unchanged. The Sc substitution (S = 0) at the Fe sites (S = 5/2) tend to suppress the low ferromagnetic interactions in the magnetic structure; however, the magnetic exchange coupling J BB decreases under 5.0 meV with increasing x. The electric polarization decreases with x up to 63 μC/m 2 for 5 %-Sc to 22 μC/m 2 for 25 %-Sc.

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Section: Structural Propertiessupporting

confidence: 57%

Effect of Spin Dilution on the Magnetic State of Delafossite CuFeO2 with an S = 5/2 Antiferromagnetic Triangular Sublattice

Elkhoun

Amami

Hlil

et al. 2015

J Supercond Nov Magn

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“…The decreases of the unit cell volume with increasing xwell agrees with the decrease of the ionic radius as rhodium (r = 0.66Å) is substituted for manganese (r = 0.58Å) [21]. However, the change is rather anisotropic as it is mainly due to the shrinking of the aparameter whereas the cparameter remains more or less constant.…”

Section: Structural Propertiessupporting

confidence: 70%

The Structural and Magnetic Properties of CuRh1−x Mn x O2 (0 ≤ x ≤ 0.1) Delafossite Oxide

Amami

Hlil

Salah³

2016

J Supercond Nov Magn

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The CuRh 1−x Mn x O 2 (0.00 ≤ x ≤ 0.10) polycrystalline powders were synthesized by the direct solidstate reaction. The magnetic susceptibility was measured in the temperature range of 4-300 K. It was found that the magnetic susceptibility (χ ) increases rapidly with the doping of Rh 3+ by Mn 3+ ions with existence of paramagnetic substance at low temperature. For x = 0.1, a development of new antiferromagnetic (AF) transition around 26 K and the magnetic data for CuRh 1−x Mn x O 2 show evidence for weak ferromagnetic (FM) transition between 100 and 130 K. Clear hysteresis loops indicate that FM order exists in Mn-doped samples at 5 K. All samples behave like semiconductors. The ferromagnetism properties can be attributed to the double-exchange interaction between the Mn 3+ and Rh 3+ semiconductor compounds. We analyze the magnetic entropy change S M of CuRh 0.9 Mn 0.1 O 2 . Using Arrott plots, it was found that the phase transition for this sample at T N = 42 K is of second order. The maximum entropy change of ∼ 0.017 J/kg K upon a filed variation of ∼ 1 T and ∼ 0.076 J/kg K upon a filed variation of ∼ 5

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“…CuAlO 2 delaphossite is known from the seventies [9,11] and more recently has been reported as a p-type transparent conducting oxide [12]. Consequently, CuAlO 2 epitaxial thin films were proposed for the development of transparent electronics [13].…”

Section: P-type Oxides: Cualomentioning

confidence: 99%

“…In this work, we report our recent progresses in the enhancement of performance of bulk thermoelectric oxides: Al 2 O 3 doped ZnO as n-type [8] and CuAlO 2 [9,10] p-type. For the first time, we discuss the effect of melt-texturing process on the thermoelectric properties of CuAlO 2 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of <i>n</i>-type and <i>p</i>-type thermoelectric oxides

Mele

Matsumoto

Miyazaki

2010

Trans. Mat. Res. Soc. Japan

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α and γ Al 2 O 3 doped sintered ZnO (n-type) and sintered CuAlO 2 (p-type) pellets were prepared by conventional solid state synthesis starting from the oxides. 2% γ Al 2 O 3 doped ZnO was the best n-type sample showing a thermoelectric figure of merit ZT = 0.17 at 800 °C. In the case of p-type CuAlO 2 sample, ZT = 0.035 at 800 °C was obtained by application of melt-textured growth (MTG) process to the sintered pellet. In this work, MTG was recognized for the first time as effective way for the enhancement of thermoelectric properties of CuAlO 2 .

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Chemistry of noble metal oxides. I. Syntheses and properties of ABO2 delafossite compounds

Cited by 491 publications

References 2 publications

Effect of Spin Dilution on the Magnetic State of Delafossite CuFeO2 with an S = 5/2 Antiferromagnetic Triangular Sublattice

Effect of Spin Dilution on the Magnetic State of Delafossite CuFeO2 with an S = 5/2 Antiferromagnetic Triangular Sublattice

The Structural and Magnetic Properties of CuRh1−x Mn x O2 (0 ≤ x ≤ 0.1) Delafossite Oxide

Synthesis and characterization of <i>n</i>-type and <i>p</i>-type thermoelectric oxides

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