Anisotropic magneto-transport properties of layered perovskite Sr3Fe2-xCoxC7-δcrystals

Nakamura, Ryouta; Tozawa, J.; Akaki, Mitsuru; Akahoshi, Daisuke; Itatani, Kiyoshi; Kuwahara, H.

doi:10.1088/1742-6596/400/3/032060

Cited by 2 publications

(1 citation statement)

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“…The lamella lattice gives it potential as an intercalation host [8][9][10][11][12][13] and a platform for developing anisotropic electronic/magnetic systems. 6,7,[14][15][16][17] On the other hand, the terminal anions on the slab surface can participate readily in substitution and/or elimination. The latter property, particularly under ammonolytic conditions, renders the layered perovskites useful for preparing oxynitride type perovskites and related structures.…”

Section: Introductionmentioning

confidence: 99%

Transformation of a layered perovskite to a defect perovskite via cooperative Li-insertion and O/N substitution

Kim

Park³

et al. 2014

Dalton Trans.

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Defect perovskite oxynitrides containing lithium on the octahedral sites, i.e., Sr(1-x)(Li(x)Ta(1-x))(O(3.5-3x-3y)N(2y)), were produced by the ammonolytic heating of a layered perovskite, Sr2Ta2O7, with Li2CO3. The above phase evolution involved the thermal diffusion of Li(+) into the Sr2Ta2O7 lattice and concurrent 3O(2-) → 2N(3-) substitution. The concentrations of Li, N, and anion vacancies in the product oxynitride could be controlled by adjusting the Li2CO3 to Sr2Ta2O7 ratio in the reactant mixture. This study identified three different compositions, Sr(0.92)Li(0.08)Ta(0.92)O(1.91)N(0.89), Sr(0.83)Li(0.17)Ta(0.83)O(1.88)N(0.74) and Sr(0.73)Li(0.27)Ta(0.73)O(1.82)N(0.58), where an increase in the Li composition accompanied decreases in the a- and c-parameters of the tetragonal cell, along with an increase in the band gap. Neutron diffraction and solid state (7)Li nuclear magnetic resonance spectroscopy of Sr(1-x)(Li(x)Ta(1-x))(O(3.5-3x-3y)N(2y)) showed that Li occupied the octahedral site, and these oxynitrides exhibited enhanced bond covalency compared to similar oxides.

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Section: Introductionmentioning

confidence: 99%

Transformation of a layered perovskite to a defect perovskite via cooperative Li-insertion and O/N substitution

Kim

Park³

et al. 2014

Dalton Trans.

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Magnetoresistance Materials

Terasaki

2017

Handbook of Solid State Chemistry

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The magnetoresistance (MR) is a most fundamental transport parameter for metals and semiconductors. This chapter reviews various magnetic materials showing large MR, mainly focusing on transition metal oxides with strong electron correlations. The Boltzmann equation predicts that the classical MR is always positive and small, and the field dependence is quadratic at low fields. When one takes quantum natures into account, however, the MR can be negative, large, or nonmonotonic with fields. The chapter summarizes various types of MR. It also introduces bulk giant MR (GMR) materials with peculiar interactions between localized spins and conduction electrons. The chapter further explains why and how external magnetic fields cause a metal‐insulator transition in the colossal MR (CMR) materials.

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Anisotropic magneto-transport properties of layered perovskite Sr₃Fe_2-xCo_xC_7-δcrystals

Cited by 2 publications

References 10 publications

Transformation of a layered perovskite to a defect perovskite via cooperative Li-insertion and O/N substitution

Transformation of a layered perovskite to a defect perovskite via cooperative Li-insertion and O/N substitution

Magnetoresistance Materials

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