| Publons ID | 19503922 |
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| Wos ID | WOS:000397198500075 |
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| Doi | 10.1016/j.jmmm.2016.11.124 |
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| Title | Structural and magnetic properties of La<SUP>3+</SUP> substituted barium-natural nanoferrites as microwave absorber in X-band |
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| First Author | Widanarto, W.; Amirudin, F.; Ghoshal, S. K.; |
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| Last Author | Cahyanto, W. T. |
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| Authors | Widanarto, W; Amirudin, F; Ghoshal, SK; Effendi, M; Cahyanto, WT; |
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| Publish Date | MAR 15 2017 |
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| Journal Name | JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS |
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| Citation | 23 |
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| Abstract | Selection of proper microwave absorbers in the X-band is vital to prevent the interference issues that often damage devices and cause signal degradation. In this spirit, we prepared three La3+ substituted barium-natural nanoferrites (BNFs) samples with chemical composition of BaO:(x) La2O3:(6-x) Fe2O3 (x=0, 0.1, 0.2 in mol) via solid-state reaction route. Synthesized samples were characterized via SEM, XRD, VSM, and VNA measurements to determine the La3+ ions concentration dependent variation in the structural, magnetic and microwave absorption properties. Transmission/reflection line (TRL) method was used to evaluate the samples reflection loss. La3+ free samples sintered at 1100 degrees C revealed hexagonal BaFe12O19 and rhombohedral Fe2O3 phases. SEM images displayed the growth of new particle with the average size of 0.2 - 0.8 mu m as filler in BNFs. Furthermore, an incorporation of La3+ into the BNF system manifested the emergence of new BaLa2Fe2O7 tetragonal crystal phase. The average crystallite size of BNF was found to decrease with increasing La3+ ion concentrations. Conversely, substitution of La3+ in the BNF caused insignificant changes in the magnetic properties, the real part of the relative permittivity and the natural resonance frequency. Meanwhile, a reasonable shift in the microwave frequency absorption and enhancement in the reflection loss was evidenced due to the inclusion of La3+. BNF sample containing 0.2 mol La2O3 exhibited a saturation magnetization and magnetic field anisotropy of 19.02 and 0.36 T, respectively, where the maximum reflection loss is discerned to be -26.61 dB at 10.87 GHz with 1.25 GHz bandwidth. This new class of ferrites may be prospective for microwave absorber in the X-band. |
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| Publish Type | Journal |
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| Publish Year | 2017 |
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| Page Begin | 483 |
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| Page End | 486 |
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| Issn | 0304-8853 |
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| Eissn | 1873-4766 |
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| Url | https://www.webofscience.com/wos/woscc/full-record/WOS:000397198500075 |
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| Author | WAHYU TRI CAHYANTO, S.Si, M.Si, Ph.D |
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| File | 2755.pdf |
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