Structural, electrical and magnetic properties of Fe–Co–Cr and Fe–Co–Cr–N nanocrystalline alloy films

Wang, W.; Yue, Guanghui; Chen, Y.; Mi, Wenbo; Bai, Haili; Peng, Dong‐Liang

doi:10.1016/j.jallcom.2008.07.047

Cited by 11 publications

(6 citation statements)

References 21 publications

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“…Co-Fe thin films are strong candidates for application in high density magnetic recording head due to their high saturation magnetization. However, they do not possess low coercivity values and therefore researchers have employed different methods in order to reduce their coercivity [7][8][9]. Recent advances in the area of nanocrystalline materials have shown that grain size reduction in ferromagnetic materials can result in very significant reduction in coercivity value of thin films with no effect on their saturation magnetization [9,10].…”

Section: Introductionmentioning

confidence: 99%

Studies of electrical resistivity and magnetic properties of nanocrystalline CoFeCu thin films electrodeposited from citrate-added baths

Mehrizi

Sohi

Shafahian

et al. 2011

J Mater Sci: Mater Electron

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In this study, nanocrystalline CoFeCu thin films were electrodeposited at different current densities from baths with natural pH (around 5.2) and containing 20 g/L citrate sodium. The relationship of films structure with soft magnetic properties and electrical resistivity, which are required for new generation magnetic head core, were investigated. SEM, EDS, XRD, TEM, VSM and four probe-point methods were used for characterization of the deposited films. The deposited films exhibited very uniform and homogenous structure with co-axis grains (confirmed by (111) and (110) poles figures and TEM images) throughout the coating. Overall, it was noticed that increasing current density from 1 to 24 mA/cm 2 reduced both grain size (from 63 to 8 nm) and coercivity (from 20 to 1 Oe) of the films. In addition, plotting Log (Hc) versus Log (D 6 ) demonstrated that the coercivity of the films followed ''D 6 law''. Moreover, increasing current density changed phase structures of the films from FCC (Cu)?FCC (Co) to FCC (Co) and then to FCC (Co)

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Section: Introductionmentioning

confidence: 99%

Studies of electrical resistivity and magnetic properties of nanocrystalline CoFeCu thin films electrodeposited from citrate-added baths

Mehrizi

Sohi

Shafahian

et al. 2011

J Mater Sci: Mater Electron

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“…Figure 4 shows the dependence of complex permeability on frequency f for the films with various x from high value to low value. The demand of good high-frequency properties is that with the increase of the frequency f , the μ value is high and keeps almost invariable until μ decreases greatly; however the μ value is low and keeps invariable or slow increase until the appearance of the ferromagnetic resonance peak [6,7,9,10]. Based on this criterion, we can evaluate the measurement results of the complex permeability μ = μ − jμ on the frequency f .…”

Section: Resultsmentioning

confidence: 99%

“…Comparing with the MIGF systems and metal soft magnetic films [4][5][6][7][8][9][10][11], little definite work has been focused on the soft magnetic properties and the high-frequency characteristics of another systems which are fabricated by the semiconductor materials and ferromagnetic metal. Considering the moderate resistivity and special transport properties of semiconductors such as ZnO, SnO 2 , and HfO 2 , metal-semiconductor granular films (MSCGF) consisting of magnetic metal nano-granules uniformly distributed in a semiconductor matrix may also possess good soft magnetic properties and high-frequency properties.…”

Section: Introductionmentioning

confidence: 99%

Good High-Frequency and Soft Magnetic Properties of (Ni75Fe25) x (ZnO)1−x Nano-Granular Films with Wide Metal Volume Fraction (x) Range

Zhou

Yao

Li-ling

et al. 2015

J Supercond Nov Magn

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Excellent soft magnetic properties in a wide x range with coercivity not exceeding 5.0 Oe were obtained successfully in the (Ni 75 Fe 25 ) x (ZnO) 1−x granular films which were fabricated by the magnetic alloy Ni 75 Fe 25 and semiconductor ZnO. For the typical sample with x = 0.74, coercivities in hard and easy axes are 1.1 and 1.7 Oe, respectively, and the electric resistivity ρ reaches 425 μ cm. The dependence of complex permeability u = u − ju on frequency f shows that the real part u is more than 200 below 1.0 GHz and the ferromagnetic resonance frequency f r reaches 1.32 GHz, implying the promising for high-frequency application.

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“…It was worth mentioning that the film had a high resistivity of up to 2215 μ·cm. This is one order of magnitude larger than that of some other FeCo-based films [4,5,24], which may result from the slight surface oxidization of Fe 65 Co 35 alloy crystallites. In order to verify this point, we measured the temperature dependence of resistance .…”

Section: Fe-co-based Nanocrystalline Alloy Filmsmentioning

confidence: 78%

“…Soft magnetic films are widely investigated [1][2][3][4][5][6] and strongly demanded for high-frequency applications, such as soft magnetic underlayers in recording media [7], high-density recording head cores [8,9], planar inductors and film transformers in integrated circuits [1,10]. The basic demands for the operation in GHz range include high saturation magnetization (M s ), low coercivity (H c ), high permeability (µ), high electrical resistivity (ρ) and appropriate anisotropy field (H k ).…”

Section: Introductionmentioning

confidence: 99%

High-frequency magnetic characteristics of Fe-Co-based nanocrystalline alloy films

Peng

Wang

et al. 2010

Sci. China Technol. Sci.

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Magnetically soft Fe-Co-based nanocrystalline alloy films were produced by two preparation methods: One using a new energetic cluster deposition technique and another using a conventional magnetron sputtering technique. Their structural, static magnetic properties and high-frequency magnetic characteristics were investigated. In the energetic cluster deposition method, by applying a high-bias voltage to a substrate, positively charged clusters in a cluster beam were accelerated electrically and deposited onto a negatively biased substrate together with neutral clusters from the same cluster source, to form a high-density Fe-Co alloy cluster-assembled film with good high-frequency magnetic characteristics. In the conventional magnetron sputtering method, only by rotating substrate holder and without applying a static inducing magnetic field on the substrates, we produced Fe-Co-based nanocrystalline alloy films with a remarkable in-plane uniaxial magnetic anisotropy and a good soft magnetic property. The obtained Fe-Co-O, Fe-Co-Ti-N, and Fe-Co-Cr-N films all revealed a high real permeability exceeding 500 at a frequency up to 1.2 GHz. This makes Fe-Co-based nanocrystalline alloy films potential candidates as soft magnetic thin film materials for the high-frequency applications.Fe-Co-based nanocrystalline alloy films, high-frequency characteristics, energetic cluster deposition, magnetron sputtering, substrate rotation Citation:Peng D L, Wang X, Wang W, et al. High-frequency magnetic characteristics of Fe-Co-based nanocrystalline alloy films.

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Structural, electrical and magnetic properties of Fe–Co–Cr and Fe–Co–Cr–N nanocrystalline alloy films

Cited by 11 publications

References 21 publications

Studies of electrical resistivity and magnetic properties of nanocrystalline CoFeCu thin films electrodeposited from citrate-added baths

Studies of electrical resistivity and magnetic properties of nanocrystalline CoFeCu thin films electrodeposited from citrate-added baths

Good High-Frequency and Soft Magnetic Properties of (Ni75Fe25) x (ZnO)1−x Nano-Granular Films with Wide Metal Volume Fraction (x) Range

High-frequency magnetic characteristics of Fe-Co-based nanocrystalline alloy films

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