Magnetic and Neutron Diffraction Study on Perovskites La1−Sr CrO3

Tezuka, Keitaro; Hinatsu, Yukio; Nakamura, Akio; Inami, Toshiya; Shimojo, Yutaka; Morii, Yukio

doi:10.1006/jssc.1998.7961

Cited by 91 publications

(72 citation statements)

References 8 publications

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“…These data were collected by cooling the samples in the constant magnetic field from 350 K. Ca doping depresses the magnetic transition T N in a manner that is more severe than that observed for Sr doping. 4 This can be understood through structural considerations. It is important to note that the average Cr-O-Cr bond angle is about 160°, according to powder neutron diffraction data on LaCrO 3 ; also, a 30% substitution of Ca for La increases the angle by only 3 about 1°.…”

Section: Resultsmentioning

confidence: 99%

“…This structure is predicted by considerations of covalency by Goodenough,7 arguments which should be valid for the Cr transition metal compounds. Structural transitions, such as the orthorhombic to rhombohedral phase transition, were observed 3,4 in La 0.80 Ca 0.20 CrO 3 .…”

Section: Introductionmentioning

confidence: 96%

“…LaCrO 3 is antiferromagnetic 3,4 below 290 K. It is a poor electrical conductor at room temperature, but its high conductivity at high temperature as well as its ability to withstand high temperatures has made it useful as an interconnect between fuel cells and as a material for heating elements. 4 A limited number of doping studies of LaCrO 3 , focusing on the electrical and magnetic properties, have been conducted whereby divalent ions such as Sr or Ca are substituted for trivalent La. Sakai et al 3 investigated doping levels up to 75% Ca and a number of oxygen concentrations.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, they reported the antiferromagnetic structure as G type for a number of Ca concentrations and conducted some magnetic susceptibility measurements. Tezuka et al 4 published an investigation of the magnetic and structural properties of La 1−x Sr x CrO 3 with 0 Ͻ x Ͻ 0.25. They also found an orthorhombic to rhombohedral phase transition for 0% and 5% Sr doping at 526 and 413 K, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Magnetotransport and magnetic properties of weak ferromagnetic semiconductors: Ca doped LaCrO3

Alvarez

Wang

Peleckis

et al. 2008

Journal of Applied Physics

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Transport, magnetic, specific heat, internal friction, and shear modulus in the charge ordered La 0. We report the magnetic and magnetotransport properties of Ca doped La 1−x Ca x CrO 3 ͑x = 0, 0.1, 0.2, and 0.3͒. Both the magnetic and transport properties are very sensitive to Ca substitution. The Néel temperature T N decreases substantially with increasing calcium doping concentration from 290 to 160 K. A weak ferromagnetic state with large coercive fields of up to 3 T is present for the Ca doped LaCrO 3 . The temperature dependence of the resistivity shows that all the Ca doped compounds are semiconducting and their resistivities decrease with increasing Ca for low doping levels. The resistivity curves show thermally activated behavior and a variable range hopping behavior at high temperatures. The magnetotransport measurements show a negative magnetoresistance. Furthermore, an anomalous peak was observed in the field dependence of magnetoresistance for the LCCO materials.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magnetotransport and magnetic properties of weak ferromagnetic semiconductors: Ca doped LaCrO3

Alvarez

Wang

Peleckis

et al. 2008

Journal of Applied Physics

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“…4,5 The magnetic properties of LaCrO 3 were found to be affected by the substitution of La 3+ with different ions, e.g. La 1-x Ca x CrO 3-δ , 3 La 1-x Sr x CrO 3-δ , 6 and La 1-x Sr x CrO 3 , 7 and La 0.95 Nd 0.05 CrO 3 , 8 with the appearance of weak ferromagnetism.…”

Section: Introductionmentioning

confidence: 99%

An ethylene glycol-based new sol-gel route to multiferroic (1–x)LaCrO₃–xBiCrO₃ solid solution

Abbasi

Guo

et al. 2018

Can. J. Chem.

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Solid solution of multiferroic (1–x)LaCrO3–xBiCrO3 has been synthesized in the perovskite structure via a new sol-gel route using ethylene glycol as solvent. This synthetic process proved to be superior to the solid state reaction method, with a lower formation temperature, improved reactivity, and a higher solubility limit. The complex chemical reactions taking place in the sol and precursor powder upon heating are investigated by simultaneous thermal gravimetry and differential thermal analysis (TG–DTA). The substitution of BiCrO3 for LaCrO3 results in a higher density for the ceramics and an increased electric conductivity at high temperatures. The sol-gel synthesized La1−xBixCrO3 solid solution (x = 0.3) exhibits a superparaelectric behaviour with a slim and nonlinear polarization – electric field hysteresis loop, whereas a double hysteresis loop of antiferroelectric appearance is displayed in the compound with x = 0.4.

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Interconnects

Hilpert¹,

Quadakkers²,

Singheiser³

2010

Handbook of Fuel Cells

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The interconnect connects the anode side of one single cell with the cathode side of the adjacent single cell, thus preventing the fuel and oxidant gasses from mixing. Ceramic and metallic interconnects are the most widely used concepts. The ceramic interconnect materials used are LaCrO 3 base perovskites doped with Sr, Ca, or Mg and other metals in order to obtain sufficient electrical conductivity, to modify the thermal expansion, and to improve the sinterability. They are used for tubular cell configurations as well as for the monolithic and planar concepts. Ceramic interconnect materials have shown excellent long‐term behavior for the tubular cells. There is a general trend towards using metallic interconnects in planar cells due to their relatively low costs, easy working potential, as well as high electrical and thermal conductivity. Most developments concentrate on Cr‐based alloys or high‐Cr ferrites depending on the cell design.

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Magnetic and Neutron Diffraction Study on Perovskites La1−Sr CrO3

Cited by 91 publications

References 8 publications

Magnetotransport and magnetic properties of weak ferromagnetic semiconductors: Ca doped LaCrO3

Magnetotransport and magnetic properties of weak ferromagnetic semiconductors: Ca doped LaCrO3

An ethylene glycol-based new sol-gel route to multiferroic (1–x)LaCrO₃–xBiCrO₃ solid solution

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Magnetic and Neutron Diffraction Study on Perovskites La1−Sr CrO3

Cited by 91 publications

References 8 publications

Magnetotransport and magnetic properties of weak ferromagnetic semiconductors: Ca doped LaCrO3

Magnetotransport and magnetic properties of weak ferromagnetic semiconductors: Ca doped LaCrO3

An ethylene glycol-based new sol-gel route to multiferroic (1–x)LaCrO3–xBiCrO3 solid solution

Interconnects

Contact Info

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About

An ethylene glycol-based new sol-gel route to multiferroic (1–x)LaCrO₃–xBiCrO₃ solid solution