Spin-valves using perovskite antiferromagnets as the pinning layers

Sakakima, H.; Satomi, Mitsuo; Hirota, Eiichi; Adachi, Hiroto

doi:10.1109/20.801046

Cited by 31 publications

(15 citation statements)

References 12 publications

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“…They are used as materials for catalysis, [2,3] photocatalysis, [4] fuel cells, [5,6] magneto-optics, [7,8] and in spin valves. [9] A number of perovskite oxides have been proposed earlier as gas-sensor materials because of their stability at high temperatures and in chemically aggressive atmospheres. Many perovskites show ptype semiconductor behavior in air.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Gas Sensing Characteristics of Nanoparticulate p‐Type Semiconducting LnFeO₃ and LnCrO₃ Materials

Siemons

Leifert

Simon

2007

Adv Funct Materials

174

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Nanoparticulate perovskite‐type LnBO3 (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu; B = Cr, Fe) oxides are prepared by polyol‐mediated synthesis. X‐ray diffraction is used to confirm the structure of the materials, and scanning electron microscopy is applied to image the sample morphology. The powders are used for the preparation of suspensions that are deposited as thick films on comb‐type Pt electrodes on alumina substrates. Electrical characterization is performed by using high‐throughput impedance spectroscopy. The materials exhibit p‐type semiconductor behavior, and their sensitivity towards H2, CO, NO, NO2, and propylene in a temperature range from 200 to 500 °C is analyzed. In addition, the time‐resolved response of the LnFeO3 materials is investigated. A correlation between the Ln–O binding energy and the sensing properties is observed.

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Section: Introductionmentioning

confidence: 99%

Preparation and Gas Sensing Characteristics of Nanoparticulate p‐Type Semiconducting LnFeO₃ and LnCrO₃ Materials

Siemons

Leifert

Simon

2007

Adv Funct Materials

174

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“…Perovskite structure material are used in a wide range of applications such as catalysis [1,4], photocatalysis [5,6], fuel cells [7], magnetooptics [8,9], and in spin valves [10]. The stability of perovskite materials at high temperatures and in chemically aggressive atmospheres has made these materials such as SrTiO 3 and BrTiO 3 suitable as gassensor materials [11,12].…”

Section: Introductionmentioning

confidence: 99%

Preparation, surface state and band structure studies of SrTi(1−x)Fe(x)O(3−δ) (x=0–1) perovskite-type nano structure by X-ray and ultraviolet photoelectron spectroscopy

et al. 2012

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“…The importance of complex perovskites is in the possibility of creating new magnetic materials A2BB'O6, with B and B' constituted by magnetic 3d cations. Recently, the study of these materials has increased due to the possibility of applying them in the design and technology of magnetic devices for applications in high capacity magnetic information storage devices and RAM memories [2][3], prototypes for the transport of polarized currents [4], hard magnets [5], magnetic sensors [6], systems based on magnetic nanoparticles [7], among others. Likewise, during the last years, the calculations of first principles based on the Functional Theory of Density (DFT) have become a usual and very precise method for the theoretical prediction of diverse properties of perovskite-type materials, such as the crystallographic structure, electric transport mechanisms (considering the polarization of spin) and the distribution of valence electrons around the Fermi level that allow characterizing the material as an insulator, semiconductor, conductor or half-metallic.…”

Section: Introductionmentioning

confidence: 99%

Half-metallic electronic feature and thermophysicalproperties of the Ba2CoMoO6perovskite-like cobalt molybdate

Deluque-Toro

Gil-Rebaza²,

Hernández³

et al. 2020

revuin

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Perovskite-like materials which include magnetic elements have relevance due to the technological perspectives in the spintronics industry. In this work, the magnetic, structural and electronic properties of the Ba2CoMoO6double perovskite are investigated. Calculations are carried out through the Full-Potential Linear Augmented Plane Wave method within the framework of the Density Functional Theory with exchange and correlation effects in the Generalized Gradient and Local Density approximations, including spin polarization. From the minimization of energy as a function of volume using the Murnaghan’s state equation the equilibrium lattice parameter and cohesive properties of this compound were obtained. The study of the electronic structure was based in the analysis of the electronic density of states, and the band structure, showing that this compoundevidences a conductive character for a spin channel and insulation for the other, and presents an integer value for the effective magnetic moment (3.0 μB), which allows it to be classified as a half-metallic material. The effects of pressure and temperature on thermophysical properties such as specific heat, Debye temperature, coefficient of thermal expansion and the Grüneisen parameter were calculated and analyzed from the state equation of the system. The obtained results reveal that, in the low temperature regime, the specific heat at constant volume and pressure presents an analogous behavior to each other, with a tendency to the limit of Dulong-Petit typical of the structures of cubic perovskite type, showing a value of 246.3 J/mol.Kat constant volumeand slightly higher values at constant pressure. The dependence of the coefficient of thermal expansion, the temperature of Debye and the Grüneisen parameter with the increase in temperature is discussed in relation to other perovskite-like materials.

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Spin-valves using perovskite antiferromagnets as the pinning layers

Cited by 31 publications

References 12 publications

Preparation and Gas Sensing Characteristics of Nanoparticulate p‐Type Semiconducting LnFeO₃ and LnCrO₃ Materials

Preparation and Gas Sensing Characteristics of Nanoparticulate p‐Type Semiconducting LnFeO₃ and LnCrO₃ Materials

Preparation, surface state and band structure studies of SrTi(1−x)Fe(x)O(3−δ) (x=0–1) perovskite-type nano structure by X-ray and ultraviolet photoelectron spectroscopy

Half-metallic electronic feature and thermophysicalproperties of the Ba2CoMoO6perovskite-like cobalt molybdate

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Spin-valves using perovskite antiferromagnets as the pinning layers

Cited by 31 publications

References 12 publications

Preparation and Gas Sensing Characteristics of Nanoparticulate p‐Type Semiconducting LnFeO3 and LnCrO3 Materials

Preparation and Gas Sensing Characteristics of Nanoparticulate p‐Type Semiconducting LnFeO3 and LnCrO3 Materials

Preparation, surface state and band structure studies of SrTi(1−x)Fe(x)O(3−δ) (x=0–1) perovskite-type nano structure by X-ray and ultraviolet photoelectron spectroscopy

Half-metallic electronic feature and thermophysicalproperties of the Ba2CoMoO6perovskite-like cobalt molybdate

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Preparation and Gas Sensing Characteristics of Nanoparticulate p‐Type Semiconducting LnFeO₃ and LnCrO₃ Materials

Preparation and Gas Sensing Characteristics of Nanoparticulate p‐Type Semiconducting LnFeO₃ and LnCrO₃ Materials