Properties of barium hexa-ferrite thin films dependent on sputtering pressure

Xu, Huizhong; Zhang, Wenxu; Peng, Bin; Zhang, Wanli

doi:10.1016/j.apsusc.2010.10.045

Cited by 30 publications

(9 citation statements)

References 14 publications

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“…As the energy of the ions and atoms reaching the substrate increases with the laser fluence, the preferential re-sputtering on the film surface becomes more likely [22,23]. Let's consider a sputtering process with two independent targets ((1) Ba and (2) Fe).…”

Section: Resultsmentioning

confidence: 99%

Stoichiometry, phase, and texture evolution in PLD-Grown hexagonal barium ferrite films as a function of laser process parameters

Yu¹,

Соколов²,

Kulik³

et al. 2020

Journal of Alloys and Compounds

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Barium hexaferrite (BaFe12O19 or BaM) films were grown on c-plane sapphire (0001) substrates by pulsed laser deposition (PLD) to evaluate the effects of laser fluence on their composition, structure, and magnetic properties. A Continuum Surelite pulsed 266 nm Nd:YAG laser was employed, and the laser fluence was varied systemically between 1 and 5.7 [J/cm 2 ]. Deviations from the stoichiometric transfer between the BaM targets and deposited thin films occurred as the laser fluence changed. The Fe to Ba ratio in the films increased with laser fluence. The films deposited at laser fluences below 4 J/cm 2 showed undesirable 3-dimensional island growth.Moreover, insufficient laser energy resulted in the deposition of some secondary phases, for example, Barium monoferrite (BaFe2O4) and Magnetite (Fe3O4). Alternatively, laser fluences above 5 J/cm 2 promoted resputtering of the growing film at the substrate and degraded film quality, structure, and magnetic properties. BaM films deposited at 4.8 J/cm 2 -the optimal laser fluenceshowed excellent c-axis orientation perpendicular to the film plane with an anisotropy field of 16 kOe and saturation magnetization of 4.39 kG. These results clearly demonstrate a strong influence of laser parameters on PLD-grown hexaferrite films and provide a path for high-yield production using pulsed laser depositions systems.

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Section: Resultsmentioning

confidence: 99%

Stoichiometry, phase, and texture evolution in PLD-Grown hexagonal barium ferrite films as a function of laser process parameters

Yu¹,

Соколов²,

Kulik³

et al. 2020

Journal of Alloys and Compounds

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“…Material barium heksaferittermasuk bahan keramik yang merupakan bahan magnetik. Material ini memiliki karakteristik: temperatur Curie, koersivitas, saturasi magnetik dan anisotropi magnetik yang relative tinggi serta stabilitas kimia yang sangat baik [1][2][3][4][5]. Material barium heksaferit merupakan magnet permanen yang dapatdiaplikasikan dalam berbagai bidang sebagai hard magnetik.…”

Section: Pendahuluanunclassified

Pengaruh Penambahan Doping Mn/Cu pada Barium Heksaferit sebagai Material Penyerap Gelombang

et al. 2019

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Pada penelitian ini, telah dilakukan analisa efek doping Mn2+/Cu2+ sebanyak 0.1%mol terhadap struktur barium heksaferit sebagai material absorbsi gelombang mikro. Sintesis material dilakukan dengan metode mechanical alloying menggunakan planetary ball mill. Powder yang telah di-milling dikalsinasi pada temperature 1000 °C selama 2 jam. Powder hasil kalsinasi di kompaksi dengan tekanan 1.5 kgf/cm2 membentuk pellet dan di sinter pada temperatur 1150 °C selama 2 jam. Dari hasil eksperimen, menunjukkan penambahan ion Mn2+/Cu2+0.1 %mol mengakibatkan nilai densitas bulk meningkat jika dibandingkan dengan barium heksaferit. Efek penambahan ion Mn2+/Cu2+ menurunkan nilai koersivitas (Hjc) dan menaikkan nilai remanensi (Mr) yaitu BaFe12O19 memiliki Hjc = 6.45 KOe dan Mr = 0.91 KG, BaFe11.9Mn0.1O19 memiliki Hjc = 3.27 KOe dan Mr = 1.62 KG sedangkan BaFe11.9Cu0.1O19 memiliki Hjc = 1.75 KOe dan Mr = 1.79 KG. Pengukuran refflection loss gelombang mikro menggunkan VNA menunjukkan bahwa penambahan ion Mn2+/Cu2+ pada barium heksaferit memiliki rentang frekuensi yang berbeda. Frekuensi BaFe11.9Mn0.1O19 sekitar 4 – 10 GHz dan BaFe11.9Cu0.1O19 sekitar 4 – 8 GHz. Hal ini menunjukkan bahwa besar penyerapan gelombang yang cukup signifikan dengan adanya penambahan doping Mn/Cu 0.1 %mol jika dibandingkan terhadap barium hexaferit.

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“…In addition, barium hexaferrite possesses a unique combination of desirable properties such as low production cost, high saturation magnetization (M s ¼ 72 emu/g), high coercive force (H c ¼6700 Oe), high Curie temperature (720 K), magnetocrystalline anisotropy along c-axis (H a ¼1.7 T), chemically stable and corrosion resistant. Due to these desirable properties, it has a wide range of applications in the high-performance permanent magnetic material, magnetic recording media, ferrofluids, sensors, microwave absorbing materials, ceramic magnets in loud speakers and the rotors in small DC motors [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Improvement of the magnetic properties of barium hexaferrite nanopowders using modified co-precipitation method

Rashad

Ibrahim

2011

Journal of Magnetism and Magnetic Materials

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Properties of barium hexa-ferrite thin films dependent on sputtering pressure

Cited by 30 publications

References 14 publications

Stoichiometry, phase, and texture evolution in PLD-Grown hexagonal barium ferrite films as a function of laser process parameters

Stoichiometry, phase, and texture evolution in PLD-Grown hexagonal barium ferrite films as a function of laser process parameters

Pengaruh Penambahan Doping Mn/Cu pada Barium Heksaferit sebagai Material Penyerap Gelombang

Improvement of the magnetic properties of barium hexaferrite nanopowders using modified co-precipitation method

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