Impact of Ir4+ with single-ion anisotropy on magnetic properties of Mn1−xIrxCo2O4

The inhomogeneous cationic distribution is an important factor determining physical properties, but it has seldom been observed in bulk. In Mn1−x Rux Co2O4, high‐resolution transmission electron microscopy images illustrate segregated cationic distributions in ball milled x = 0.3, x = 0.5. It facilitates magnetic phase separations and exchange couplings. Ball milled x = 0.3 is antiferromagnetic accompanied with frustrated moments with exchange bias field 14.8 kOe. The coercivity of ball milled x = 0.1 is very high, 16.5 kOe. In x = 0.2, 0.4, and 0.5, both enhanced coercivities and exchange bias effects are observed. These phenomena are related to exchange couplings. In samples with solid state reaction, high coercivities are obtained in x = 0.3 as 16.3 kOe and in x = 0.2 as 4.4 kOe, while low coercivities are observed in x ≤ 0.1 and x = 0.5. After being annealed at high pressure and high temperature, homogeneous samples without ionic segregations display low coercivity of 30 Oe. In Mn1−x Rux Co2O4, both the coercivity increment and the bias field are higher than those reported in multilayer interfaces or core/shell nanoparticles. This is due to the perfect interfaces between different magnetic phases in one compound. A new strategy toward high‐performance permanent magnets with high coercivities is presented.

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Emerging High Coercivity and Huge Exchange Bias Effect in Single Phased Mn₁₋_xRu_xCo₂O₄ Compounds

Chang

Tang

Lian

et al. 2019

Adv Elect Materials

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Linear Magnetodielectric Effect and Huge Negative Magnetization in a Mixed-Valent Cobalt Manganite Spinel Oxide

Meera

Muralidharan

Jeong

2022

J Supercond Nov Magn

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Intelligent Hardness Prediction of Bearing Rings Using Pulsed Eddy Current Testing

Sha

Fan

2022

IEEE Sensors J.

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Impact of Ir4+ with single-ion anisotropy on magnetic properties of Mn1−xIrxCo2O4

Cited by 3 publications

References 15 publications

Emerging High Coercivity and Huge Exchange Bias Effect in Single Phased Mn₁₋_xRu_xCo₂O₄ Compounds

Emerging High Coercivity and Huge Exchange Bias Effect in Single Phased Mn₁₋_xRu_xCo₂O₄ Compounds

Linear Magnetodielectric Effect and Huge Negative Magnetization in a Mixed-Valent Cobalt Manganite Spinel Oxide

Intelligent Hardness Prediction of Bearing Rings Using Pulsed Eddy Current Testing

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Impact of Ir4+ with single-ion anisotropy on magnetic properties of Mn1−xIrxCo2O4

Cited by 3 publications

References 15 publications

Emerging High Coercivity and Huge Exchange Bias Effect in Single Phased Mn1−xRuxCo2O4 Compounds

Emerging High Coercivity and Huge Exchange Bias Effect in Single Phased Mn1−xRuxCo2O4 Compounds

Linear Magnetodielectric Effect and Huge Negative Magnetization in a Mixed-Valent Cobalt Manganite Spinel Oxide

Intelligent Hardness Prediction of Bearing Rings Using Pulsed Eddy Current Testing

Contact Info

Product

Resources

About

Emerging High Coercivity and Huge Exchange Bias Effect in Single Phased Mn₁₋_xRu_xCo₂O₄ Compounds

Emerging High Coercivity and Huge Exchange Bias Effect in Single Phased Mn₁₋_xRu_xCo₂O₄ Compounds