Microstructure and magneto-optical properties of Pr–Ni substituted Ba hexaferrite films prepared by sputtering

Gomi, Manabu; Cho, J.; Abe, Masanori

doi:10.1063/1.366315

Cited by 6 publications

(4 citation statements)

References 10 publications

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“…Moreover, many studies have also been concerned with cationic substitutions. Usually, many cations and various cationic combinations are used in doping into barium hexaferrites, belonging to their applications such as Co-Ti-Mn and Mn-Ti substitutions for the microwave absorbers [5], Zn-Ti, Co-Sn, Co-Ti and Cr or Y doping for high density magnetic recording applications [11,13,16,17] and Co, Cr, Mn, Ni and Pr-Ni additions for magneto-optical applications [18,19].…”

Section: Introductionmentioning

confidence: 99%

Effect of La doping on structural, magnetic and microstructural properties of Ba1 − x La x Fe12O19 ceramics prepared by citrate combustion process

2006

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La-substituted M-type barium ferrites, Ba 1−x La x Fe 12 O 19 , with x = 0.00-0.30 were successfully prepared via a citrate combustion process. Properties of the ceramics were characterized by powder X-ray diffraction, vibrating sample magnetometry and scanning electron microscopy. XRD patterns revealed only magnetoplumbite structure without minor phases. With increasing the La substituted content, the saturation magnetization (M S ) was increased and reached to a maximum at x = 0.15 and then decreased but coercivity (H C ) was increased. SEM micrographs of the dense ceramics showed the hexagonal platelet shape at low La content and the irregular shape at high La content.

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Section: Introductionmentioning

confidence: 99%

Effect of La doping on structural, magnetic and microstructural properties of Ba1 − x La x Fe12O19 ceramics prepared by citrate combustion process

2006

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“…The application of BaFe 12 O 19 , both pure and doped, has been of interest for some years due to its low production cost while providing excellent magnetic properties [1][2][3]. In particular, BaFe 12 O 19 powders are currently being investigated for use in perpendicular recording [4].…”

Section: Introductionmentioning

confidence: 99%

M ssbauer spectroscopy and chemical bonds in BaFe₁₂O₁₉hexaferrite

Gao

Zhang

2003

J. Phys.: Condens. Matter

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Barium hexaferrite was synthesized by chemical co-precipitation. Its Mössbauer spectra were obtained. A semi-empirical model, based on the Phillips theory of bonding, has been developed for quantitative explanation of the Mössbauer isomer shifts of Fe ions in BaFe12O19 crystals. The results show that, using the relationship between isomer shifts and covalency, the site assignments in hexaferrites will be resolved easily. This paper provides a powerful tool for studying other members of the hexagonal ferrimagnetic oxides family.

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“…The optical penetration depth, δ, in BaM decreases monotonously with E. According to Atkinson et al [12] δ(2 eV)≈200 nm, δ(3.5 eV)≈25 nm with δ(2.5 eV)≈60 nm. In the low absorption region at E<2.8 eV, δ becomes close to the doubled thickness of the BaM layers and the MO spectra are combined Kerr (reflection) and Faraday (propagation) effects [13,14]. The MO contribution from the propagation effect depends on the thickness and absorption in the BaM films.…”

Section: Discussionmentioning

confidence: 99%

Magneto-optical studies of BaFe_12O_19 films grown by metallo-organic decomposition

Jakubisova-Liskova¹,

Višňovský²,

Široký³

et al. 2015

Opt. Mater. Express

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M-type barium hexagonal ferrites BaFe 12 O 19 (BaM) films considered for new devices that operate in the 40-70 GHz range with small or zero applied magnetic fields were characterized by magneto-optical (MO) complex polar "Kerr" effect (PKE) spectroscopy, MO magnetometry, and spectral ellipsometry (SE). The textured polycrystalline films were grown on Pt(111)/TiO 2 template on Si wafer using metallo-organic decomposition technique (MOD) followed by rapid thermal annealing. In the films grown in one, two and three MOD iterations, the thickness was evaluated by SE and transmission electron microscopy. The film thickness ranged from 30 nm to 50 nm per MOD iteration. The best films display outof-plane effective magnetic anisotropy field of 13 kOe, high perpendicular remanent magnetization and ferromagnetic resonance linewidth of 340 Oe at 60 GHz. The coercivity deduced from the MO hysteresis loops ranged between 0.25 kOe and 0.52 kOe. The SE and PKE spectra were taken at photon energies from 0.7 eV to 6.4 eV and from 1.2 eV to 4.8 eV, respectively. The PKE spectra display the structure observed on BaM single crystal natural faces normal to the c-axis. They are consistent with magnetoplumbite structure, with high degree of grain c-axis ordering, absence of foreign phases and Fe valence-exchange mechanism. Single phase nature of the films was further confirmed by grazing incidence X-ray diffraction and 57 Fe nuclear magnetic resonance at 4.2 K.

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Microstructure and magneto-optical properties of Pr–Ni substituted Ba hexaferrite films prepared by sputtering

Cited by 6 publications

References 10 publications

Effect of La doping on structural, magnetic and microstructural properties of Ba1 − x La x Fe12O19 ceramics prepared by citrate combustion process

Effect of La doping on structural, magnetic and microstructural properties of Ba1 − x La x Fe12O19 ceramics prepared by citrate combustion process

M ssbauer spectroscopy and chemical bonds in BaFe₁₂O₁₉hexaferrite

Magneto-optical studies of BaFe_12O_19 films grown by metallo-organic decomposition

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Microstructure and magneto-optical properties of Pr–Ni substituted Ba hexaferrite films prepared by sputtering

Cited by 6 publications

References 10 publications

Effect of La doping on structural, magnetic and microstructural properties of Ba1 − x La x Fe12O19 ceramics prepared by citrate combustion process

Effect of La doping on structural, magnetic and microstructural properties of Ba1 − x La x Fe12O19 ceramics prepared by citrate combustion process

M ssbauer spectroscopy and chemical bonds in BaFe12O19hexaferrite

Magneto-optical studies of BaFe_12O_19 films grown by metallo-organic decomposition

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M ssbauer spectroscopy and chemical bonds in BaFe₁₂O₁₉hexaferrite