کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1800829 1024546 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Complex permittivity, permeability and microwave absorbing properties of (Mn2−xZnx)U-type hexaferrite
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Complex permittivity, permeability and microwave absorbing properties of (Mn2−xZnx)U-type hexaferrite
چکیده انگلیسی

Complex permittivity, permeability and microwave absorbing properties of a U-type hexaferrite series Ba4Mn(2−x)ZnxFe36O60 (with 0≤x≤2 in step of 0.5) have been examined in the X-band (8.2–12.4 GHz) frequency range. The series have been prepared using conventional solid state reaction route. Microstructural variations with composition have been found with X-ray diffraction (XRD) and scanning electron microgram (SEM). The complex permittivity (ε⁎=ε′−jε″) and permeability (μ⁎=μ′−jμ″) were measured using vector network analyzer (Agilient Make model PNA E8364B). These parameters were then used for calculating the reflection loss for determination of microwave absorbing properties. Addition of Zn resulted in an increase in reflection loss from −4 dB (or 60 % absorption) in sample with x= 0 to −32 dB (99.92% absorption) in sample with x=1 when the sample thickness was 1.7 mm. Multiple peaks of resonance were obtained in the dielectric and magnetic loss spectra for all samples with x>0. The result indicates that the sample with composition Ba4MnZnFe36O60, i.e., x=1, can be used effectively for microwave absorption and suppression of electromagnetic interference.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 322, Issue 19, October 2010, Pages 2908–2914
نویسندگان
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