Impact of Pr–Ni substitution on the electrical and magnetic properties of chemically derived nanosized strontium–barium hexaferrites

Iqbal, Muhammad Javed; Farooq, Saima

doi:10.1016/j.jallcom.2010.06.073

Cited by 95 publications

(32 citation statements)

References 34 publications

(56 reference statements)

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“…Figure 2 shows the TG-DTA plots, for the undoped sample. Dehydration, decomposition and sintering are common processes known to occur during heat treatment [16]. With the increase of temperature, there is no noticeable weightlessness in TG curve, and we have the exothermic peak at the temperature of higher than 850°C in the DTA curve, indicating the formation of hexagonal phase.…”

Section: Methodsmentioning

confidence: 64%

“…The enhancement of H c is mainly due to the higher magnetocrystalline anisotropy, which is attributed to change of Fe +3 to Fe +2 . Also, the magnetic behavior of hexaferrite materials is governed by the strength of Fe +3 -Fe +3 exchange interactions [16]. The magnetic dilution and spin canting disrupt and weaken the Fe +3 -O-Fe +3 exchange interaction by Fe +2 ions and promote lower M s .…”

Section: Magnetic Propertiesmentioning

confidence: 99%

“…The magnetic dilution and spin canting disrupt and weaken the Fe +3 -O-Fe +3 exchange interaction by Fe +2 ions and promote lower M s . We have measured the reflection loss of the samples in the X (8-12 GHz) and Ku (12)(13)(14)(15)(16)(17)(18) bands. According to transmittance line theory, the reflection loss of electromagnetic wave under normal incident wave in the case of a metal-back single layer is given by…”

Section: Magnetic Propertiesmentioning

confidence: 99%

See 2 more Smart Citations

Structural, Magnetic and Microwave Properties of Eu-doped Barium Hexaferrite Powders

Khademi

Poorbafrani

Kameli

et al. 2011

J Supercond Nov Magn

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Eu-doped M-type barium ferrite powders (Ba 1−x Eu x Fe 12 O 19 ) with x = 0.0, 0.1, 0.2 and 0.25 were prepared by sol-gel method. The synthesized samples are characterized by thermo gravimetric analysis (TG-DTA), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), vibrating sample magnetometer (VSM) and vector network analyzer. All the synthesized samples have the nearly singlemagnetoplumbite phase. The results show that the crystallite size of doped samples is smaller than pure one. The saturation magnetization of doped ferrites decreases by the increase in Eu doping, while the coercivity increases. Maximum coercivity achieved in this study is 6.12 KOe for x = 0.25 sample. The enhancement of coercivity by Eu doping is mainly due to the higher magnetocrystalline anisotropy, which is attributed to the partial change of Fe +3 ion to Fe +2 ion. The maximum reflection loss (RL) of −43 dB at frequency range of 12-18 GHz for the x = 0.1 sample was obtained. The increase in reflection loss at higher frequency suggests that the Eu-doped sample can be used for the application in microwave devices.

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Section: Methodsmentioning

confidence: 64%

Section: Magnetic Propertiesmentioning

confidence: 99%

Section: Magnetic Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Structural, Magnetic and Microwave Properties of Eu-doped Barium Hexaferrite Powders

Khademi

Poorbafrani

Kameli

et al. 2011

J Supercond Nov Magn

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show abstract

“…In addition, the magnetic properties of hexaferrite material are also due the strength of Fe 3+ -Fe 3+ exchange interactions [24]. The magnetic dilution and spin canting interrupts and weaken the Fe 3+ -O-Fe 3+ exchange interaction by Fe 2+ ions and causes lower Ms. Also the annealing will lead to grain growth and its impact on the variation of coercivity is quite reasonable.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Effect of Annealing Temperature on Different Physical Properties of Sr0.5la0.5Mg0.5Fe11.5o19 Hexaferrite

Bhat¹,

Habib²,

Sharma³

et al. 2017

SAEA

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The influence of annealing on different physical properties of La0.5Mg0.5Sr0.5Fe11.5O19 hexaferrites prepared by the citrate-precursor method is presented in this study. The effects of temperature on the physical properties properties of the synthesized hexaferrites have been investigated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Scanning Electron Miscroscopy (SEM) and Vibrating Sample Magnetometer (VSM). The XRD study shows the formation of hexagonal structure with grain size lying between 23.86 nm and 56.12 nm. FTIR was used to study functional groups associated with the material. A decrease in saturation magnetization (Ms), and increase in Coercivity (HC) is observed with increase in temperature. Also, anisotropy constant was calculated by using Law of Approach to saturation and is well agreement with the literature.

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“…It is reported that ions substitution may improve their properties and characteristics [5][6][7][8][9][10]. Rare-earth elements (R) have typical relaxation characteristics, which can affect the electromagnetic properties of ferrite strongly [11][12][13][14][15]. Latest breakthrough is based on the partial substitution of rare- * Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

Structural, dielectric and magnetic properties of Nd-doped Co2Z-type hexaferrites

Zou

et al. 2011

Journal of Alloys and Compounds

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Impact of Pr–Ni substitution on the electrical and magnetic properties of chemically derived nanosized strontium–barium hexaferrites

Cited by 95 publications

References 34 publications

Structural, Magnetic and Microwave Properties of Eu-doped Barium Hexaferrite Powders

Structural, Magnetic and Microwave Properties of Eu-doped Barium Hexaferrite Powders

Effect of Annealing Temperature on Different Physical Properties of Sr0.5la0.5Mg0.5Fe11.5o19 Hexaferrite

Structural, dielectric and magnetic properties of Nd-doped Co2Z-type hexaferrites

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