Microwave absorption properties of Mn- and Ti-doped strontium hexaferrite

Tabatabaie, F.; Fathi, M.H.; Saatchi, A.; Ghasemi, Ali

doi:10.1016/j.jallcom.2008.02.094

Cited by 97 publications

(40 citation statements)

References 16 publications

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“…Different cations such as Al [17], Ga, Sc, In [18,19], and various cationic combination such as, Ni-Ti [20], Co-Zr [21], Co-Sn [22], Zr-Zn [23], Co-Gd [24], Mn-Ti [25], Ni-Ru, Zn-Ru [26], Ti-Ru [27], and Co-Ti [28,29], were substituted for Fe in Barium hexaferrites. These substitutions were found to cause modifications of the magnetic properties and induce significant changes in several substituted systems.…”

Section: Introductionmentioning

confidence: 99%

Magnetic study of M-type doped barium hexaferrite nanocrystalline particles

Alsmadi

Bsoul

Mahmood

et al. 2013

Journal of Applied Physics

123

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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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Section: Introductionmentioning

confidence: 99%

Magnetic study of M-type doped barium hexaferrite nanocrystalline particles

Alsmadi

Bsoul

Mahmood

et al. 2013

Journal of Applied Physics

123

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“…The reduction in coercivity can be attributed to the grain exchange interaction effect, as has been reported in the literature (Hadjipanayis & Prinz, 1991) to occur in nanocrystalline magnetic materials. The presence of Mn-Ti ions with substituted iron in a 2b site causes reduction of the magnetocrystalline anisotropy constant for the magnetic SHF phase (Hadjipanayis & Prinz, 1991;Manawan et al, 2014;Tabatabaie et al, 2009). This site is assigned to be one of the sites for providing the large anisotropy field (Manawan et al, 2014), and hence, Hc would be reduced.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

“…Nanotechnology has therefore been the most interesting research topic for scientists thus far (Tabatabaie et al, 2009). Moreover, the impacts of the benefits of nanotechnology are greater at the industrial level.…”

Section: Introductionmentioning

confidence: 99%

“…Structural modification of SHF through Mn-Ti substitution has showed the ability of absorbing microwaves, which can reduce interference of electromagnetic waves (Baniasadi et al, 2014;Jamalian et al, 2014). Unfortunately, the coercivity of SHF is very high (H c ≈ 250 kA.m -1 ), and hence, it needs a very high resonance frequency (f r = 13.4−19.4 GHz) (Ataie, 2001;Baniasadi et al, 2014;Jamalian et al, 2014;Manawan et al, 2014;Tabatabaie et al, 2009). However, the high coercivity could be reduced so that it would be useful in most applications like RADAR.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Magnetic Characterization of Mn‐Ti Substituted SrO.6Fe2‐xMnx/2Tix/2O3 (x = 0.0–1.0) Nanoparticles by Combined Destruction Process

Fitriana¹,

Hafizah²,

Manaf³

2017

IJTech

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Single phased SrO.6Fe 2-x Mn x/2 Ti x/2 O 3 (x = 0.0; 0.5; and 1.0) nanoparticles, whose mean size was comparable with the crystallite size, were successfully fabricated through mechanical alloying and a subsequent ultrasonic destruction processes. The ultrasonic destruction process employed a transducer operated under amplitudes of 35, 45, and 55 μm. Results indicated that the mean particle size was not determined by the transducer amplitude, but the mechanical properties of the materials, as well as the initial size of the particles. After ultrasonic destruction, the mean sizes of the particles decreased to the range of 87-194 nm with a narrow distribution width. The mean particle sizes were about 1 to 3 times larger than the respective crystallite sizes. Such fine particles were aimed to decrease the coercivity, as was seen in the sample with x = 0, which showed a decrease in coercivity from 474 kA.m -1 to 24 kA.m -1 and 15 kA.m -1 . A further reduction in the coercivity was observed in Mn-Ti substituted strontium hexaferrite.

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“…Recently, many efforts have been made to develop electromagnetic wave absorption materials because of the fact that radar-absorbing technology is widely used in commercial and military applications [1][2][3][4][5][6][7]. Silicon carbide materials have many practical and potential applications in microwave absorption [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%