M-Type Barium Hexagonal Ferrite Films

Wu, Mingzhong

doi:10.5772/39103

Cited by 22 publications

(16 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…19,20 During the deposition, the oxygen pressure was 100 mTorr, the substrate-to-target separation was fixed at 6 cm, and the energy fluence of the laser beam was set to 0.7 J/cm 2 . The substrate temperature was varied as follows: 700 C for 5 min, 800 C for 30 min, 700 C for 30 min, and 800 C for 30 min.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Generation of pure spin currents via spin Seebeck effect in self-biased hexagonal ferrite thin films

Ellsworth

Chang

Janantha

et al. 2014

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

Self-biased planar millimeter wave notch filters based on magnetostatic wave excitation in barium hexagonal ferrite thin films Appl. Phys. Lett. 97, 173502 (2010); 10.1063/1.3504256Electric detection of the spin-Seebeck effect in ferromagnetic metals (invited)Light-induced generation of pure spin currents in a Pt(2.5 nm)/BaFe 12 O 19 (1.2 lm)/ sapphire(0.5 mm) structure is reported. The BaFe 12 O 19 film had strong in-plane uniaxial anisotropy and was therefore self-biased. Upon exposure to light, a temperature difference (DT) was established across the BaFe 12 O 19 thickness that gave rise to a pure spin current in the Pt via the spin Seebeck effect. Via the inverse spin Hall effect, the spin current produced an electric voltage across one of the Pt lateral dimensions. The voltage varied with time in the same manner as DT and flipped its sign when the magnetization in BaFe 12 O 19 was reversed. V C 2014 AIP Publishing LLC.

show abstract

mentioning

confidence: 99%

“…These values are close to those for high-quality BaM thin films reported previously. [20][21][22] (3) The film has a large remanent magnetization-to-saturation magnetization ratio of about 0.89 along the c axis. This large ratio results from the strong in-plane uniaxial anisotropy.…”

mentioning

confidence: 99%

Generation of pure spin currents via spin Seebeck effect in self-biased hexagonal ferrite thin films

Ellsworth

Chang

Janantha

et al. 2014

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

show abstract

“…The hexaferrites are complex oxide systems with a general chemical formula AO-Fe 2 O 3 -MO, where A is a large divalent cation, i.e., Ba, Sr, Ca, and M are a small divalent cation, i.e., Mn, Fe, Co, Ni, Cu, and Zn. They can be classified on the basis of their chemical composition and the A-M combination and the crystal structure into six fundamental, structural types: M, W, Y, X, U, and Z [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Magnetic and Structural Properties of Barium Hexaferrite Nanoparticles Doped with Titanium

2019

View full text Add to dashboard Cite

Samples of Barium Hexaferrite doped with Titanium BaFe 12−x Ti x O 19 with (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0) were synthesized by the sol-gel auto-combustion technique. The powdered samples were divided into two parts, one sintered at 850 • C and another sintered 1000 • C for 1 h and samples were characterized by different experimental techniques. The XRD patterns confirmed the presence of M-type hexaferrite phase. The sizes of the crystallites were calculated by the Scherer equation, and the sizes were in the range of 27-42 nm. Using the hysteresis loops, the saturation magnetization M s , remanence (M r ), the relative ratio (M r /M s ), and the coercivity (H c ) were calculated. The study showed that the saturation magnetization (M s ) and remanence (M r ) decreased with increasing titanium concentration and were in the range from 44.65-17.17 emu/g and 23.1-7.7 emu/g, respectively. The coercivity (H c ) ranged between 0.583 and 4.51 (kOe). The magnetic properties of these Barium Hexaferrite doped with Titanium indicated that they could be used in the recording equipment and permanent magnets.

show abstract

“…M‐type barium hexaferrite (BaM) has been widely used in various microwave applications due to its large uniaxial magnetic anisotropy . Especially, in‐plane c ‐axis highly oriented BaM film has drawn much attention in recent years for two reasons.…”

Section: Introductionmentioning

confidence: 99%

“…M -TYPE barium hexaferrite (BaM) has been widely used in various microwave applications due to its large uniaxial magnetic anisotropy. [1][2][3][4][5][6][7][8][9][10] Especially, in-plane c-axis highly oriented BaM film has drawn much attention in recent years for two reasons. One is its higher ferromagnetic resonance (FMR) frequency, about 45% larger than that of outof-plane c-axis oriented films at zero bias field; 11 the other is the minimized in-plane self-demagnetization effects that generally lead to high hysteresis loop squareness (M r /M s ) value, making self-biased operation possible in components utilizing such materials, 12 which holds much promise for further device miniaturization.…”

Section: Introductionmentioning

confidence: 99%

Orientation Growth and Magnetic Properties of BaM Hexaferrite Films Deposited by Direct Current Magnetron Sputtering

Zhang

Yue

2015

J. Am. Ceram. Soc.

View full text Add to dashboard Cite

In‐plane c‐axis oriented Ba‐hexaferrite (BaM) thin films were prepared on a‐plane (112¯0) sapphire (Al2O3) substrates using direct current (DC) magnetron sputtering followed by ex‐situ annealing. The sputtering atmosphere was found to have a great influence on the stoichiometry, orientation growth, and grain morphology of the as‐prepared BaM films. With moderate oxygen partial pressure during sputtering, in‐plane c‐axis highly oriented BaM films were obtained. The films showed strong magnetic anisotropy with a high hysteresis loop squareness (Mr/Ms of 0.96) along in‐plane easy axis and a low Mr/Ms of 0.05 along in‐plane hard axis. Rocking curves and pole figures were utilized to reveal the epitaxial‐like orientation relationship of the BaM films relative to the sapphire substrates, as well as the orientation growth dispersion of the hexagonal platelet‐shaped grains in BaM films.

show abstract

M-Type Barium Hexagonal Ferrite Films

Cited by 22 publications

References 37 publications

Generation of pure spin currents via spin Seebeck effect in self-biased hexagonal ferrite thin films

Generation of pure spin currents via spin Seebeck effect in self-biased hexagonal ferrite thin films

Magnetic and Structural Properties of Barium Hexaferrite Nanoparticles Doped with Titanium

Orientation Growth and Magnetic Properties of BaM Hexaferrite Films Deposited by Direct Current Magnetron Sputtering

Contact Info

Product

Resources

About