Attractive microwave-absorbing properties of La1−xSrxMnO3 manganite powders

Li, G.; Hu, Guiju; Zhou, H. D.; Fan, Xiaojuan; Li, X.-G.

doi:10.1016/s0254-0584(02)00039-1

Cited by 105 publications

(25 citation statements)

References 13 publications

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“…Furthermore, according to expressions (4) and (5), it can be seen that the combinations of both r and ε r determine the reflection loss. Thus, the primary variation of reflection loss with frequency can be considered to be the integrated result of dielectric loss and magnetic loss [21].…”

Section: Resultsmentioning

confidence: 99%

Designed synthesis of wide range microwave absorption Fe3O4–carbon sphere composite

Wang

Zhou

et al. 2010

Journal of Alloys and Compounds

102

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Section: Resultsmentioning

confidence: 99%

Designed synthesis of wide range microwave absorption Fe3O4–carbon sphere composite

Wang

Zhou

et al. 2010

Journal of Alloys and Compounds

102

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“…In general, these materials have large saturation magnetization, high coercivity, high Curie temperature, large uniaxial magnetic anisotropy and good chemical stability [5,6,7,8].…”

Section: Introductionmentioning

confidence: 99%

Magnetic study of M-type doped barium hexaferrite nanocrystalline particles

Alsmadi

Bsoul

Mahmood

et al. 2013

Journal of Applied Physics

127

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Co-Ti and Ru-Ti substituted barium ferrite nanocrystalline particles BaFe 12-2x ) were prepared by ball milling method, and their magnetic properties and their temperature dependencies were studied. The zero-field-cooled (ZFC) and field-cooled (FC) processes were recorded at low magnetic fields and the ZFC curves displayed a broad peak at a temperature T M . In all samples under investigation, a clear irreversibility between the ZFC and FC curves was observed below room temperature, and this irreversibility disappeared above room temperature. These results were discussed within the framework of random particle assembly model and associated with the magnetic domain wall motion. The resistivity data show some kind of a transition from insulator to perfect insulator around M T . At 2 K, the saturation magnetization slightly decreased and the coercivity dropped dramatically with increasing the Co-Ti concentration x. With Ru-Ti substitution, the 2 saturation magnetization showed small variations, while the coercivity decreased monotonically, recording a reduction of about 73% at x = 0.6. These results were discussed in light of the single ion anisotropy model and the cationic distributions based on previously reported neutron diffraction data for the CoTi substituted system, and the results of our Mössbauer spectroscopy data for the RuTi substituted system.

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“…These materials have been investigated due to their importance for both fundamental research and technological applications in permanent magnets, high-density magnetic recording, magneto-optics and microwave devices [1][2][3][4][5][6]. Different techniques have been used to prepare and characterize hexaferrite particles [7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Hopkinson peak and superparamagnetic effects in BaFe_12-xGa_xO₁₉nanoparticles

Mahmood

Bsoul

2012

EPJ Web of Conferences

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Abstract. In this article, the thermomagnetic properties of a system of Ga-substituted barium hexaferrite nanoparticles (BaFe 12-x Ga x O 19 ) prepared by ball milling were investigated. The thermomagnetic curves for the samples with x ranging from 0.0 to 1.0 exhibited sharp peaks with high magnetization just below T C (Hopkinson peaks). The height of the peak for our samples was similar or larger than previously observed or calculated values. Theoretical treatment of the experimental data demonstrated that the peaks are due to the effect of superparamagnetic relaxations of the magnetic particle. This effect was confirmed by hysteresis measurements at, and just below the temperature at which the peak occurred. Consequently, the particle diameters were calculated from the experimental data using a theoretical model based on the superparamagnetic behavior of a system of uniaxial, randomly oriented, single domain, non-interacting particles. The calculated diameters of 11 -26 nm are less than the physical diameters determined from TEM measurements. The factors responsible for the low calculated values are discussed.

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Attractive microwave-absorbing properties of La1−xSrxMnO3 manganite powders

Cited by 105 publications

References 13 publications

Designed synthesis of wide range microwave absorption Fe3O4–carbon sphere composite

Designed synthesis of wide range microwave absorption Fe3O4–carbon sphere composite

Magnetic study of M-type doped barium hexaferrite nanocrystalline particles

Hopkinson peak and superparamagnetic effects in BaFe_12-xGa_xO₁₉nanoparticles

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Attractive microwave-absorbing properties of La1−xSrxMnO3 manganite powders

Cited by 105 publications

References 13 publications

Designed synthesis of wide range microwave absorption Fe3O4–carbon sphere composite

Designed synthesis of wide range microwave absorption Fe3O4–carbon sphere composite

Magnetic study of M-type doped barium hexaferrite nanocrystalline particles

Hopkinson peak and superparamagnetic effects in BaFe12-xGaxO19nanoparticles

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Product

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Hopkinson peak and superparamagnetic effects in BaFe_12-xGa_xO₁₉nanoparticles