Magnetic annealing of plated high saturation magnetization soft magnetic FeCo alloy films

Sun, Nian X.; Mehdizadeh, S.; Bonhote, C.; Xiao, Qingnong; York, Brian

doi:10.1063/1.1855458

Cited by 12 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 33,39,40 ] Hence, annealing with the parameters used here could be utilized to relax the stress in the magnetic layers if the resonator plates have κ < 0 after fabrication, and thereby improve the sensor frequency response. But there is an opportunity to study the annealing method further to see if different process parameters can tune the stress in the other direction [ 41 ] so as to achieve performance improvement for sensors with κ > 0 as well. Further investigation is also necessary to fully understand the effect generated by high‐voltage driving amplitude.…”

Section: Resultsmentioning

confidence: 99%

Curvature and Stress Effects on the Performance of Contour‐Mode Resonant ΔE Effect Magnetometers

Matyushov

Spetzler

Zaeimbashi

et al. 2021

Adv Materials Technologies

View full text Add to dashboard Cite

Miniaturized piezoelectric/magnetostrictive contour‐mode resonators are effective magnetometers by exploiting the ΔE effect. With dimensions of ≈100–200 µm across and <1 µm thick, they offer high spatial resolution, portability, low power consumption, and low cost. However, a thorough understanding of the magnetic material behavior in these devices is lacking, hindering performance optimization. This manuscript reports on the strong, nonlinear correlation observed between the frequency response of these sensors and the stress‐induced curvature of the resonator plate. The resonance frequency shift caused by DC magnetic fields drops off rapidly with increasing curvature: about two orders of magnitude separate the highest and lowest frequency shift in otherwise identical devices. Similarly, an inverse correlation with the quality factor is found, suggesting a magnetic loss mechanism. The mechanical and magnetic properties are theoretically analyzed using magnetoelastic finite‐element and magnetic domain‐phase models. The resulting model fits the measurements well and is generally consistent with additional results from magneto‐optical domain imaging. Thus, the origin of the observed behavior is identified and broader implications for the design of nanomagnetoelastic devices are derived. By fabricating a magnetoelectric nanoplate resonator with low curvature, a record‐high DC magnetic field sensitivity of 5 Hz nT–1 is achieved.

show abstract

Section: Resultsmentioning

confidence: 99%

Curvature and Stress Effects on the Performance of Contour‐Mode Resonant ΔE Effect Magnetometers

Matyushov

Spetzler

Zaeimbashi

et al. 2021

Adv Materials Technologies

View full text Add to dashboard Cite

show abstract

“…For Pt element, it has similar atomic radius and crystal cell volume with Al element, so they play similar role in doping into FeCo alloys’ crystal lattices, thus cause similar relative lattice strain between FeCo grains, resulting in similar relative lattice deformation ( d - d 0 )/ d 0 values, which is dominant in promoting preferred orientation in (200) planes or (110) planes 26 . It is also noted that the more element doping whether Al or Pt are introduced, the more relative lattice strain are formed, so appropriate choosing of doping element and doping content is important in promoting (200) texture in FeCo thin films.…”

Section: Resultsmentioning

confidence: 99%

Effect of Pt doping on the preferred orientation enhancement in FeCo/SiO2 nanocomposite films

Liu

et al. 2019

Sci Rep

View full text Add to dashboard Cite

We prepared FeCoPt/SiO 2 thin films by sol-gel spin-coating technique. As-prepared composite films were reduced in hydrogen to induce texture growth. Structural, magnetic property and surface morphology of the films were characterized by X-ray diffraction (XRD), vibrating sample magnetometer (VSM) and scanning electron microscope (SEM). These experimental data indicate that integrated intensity ratio I (200) / I (110) of diffraction peaks (200) and (110) of FeCo firstly increases and then decreases, while the coercivity first decreases and then increases with increasing Pt doping content. The specimen with less Pt doping content has a large I (200) / I (110) value and small coervicity value, which is closely related with strong (200) texture in FeCo thin film. These results indicate that fcc-Pt is also in favor of promoting (200) FeCo texture like Al or Cu elements, and this similar trends of Pt and Al originate from their similar atomic radius and crystal cell volume.

show abstract

“…The properties of all the CoCrFeNi‐based films are compared with those of the reported soft magnetic bulk HEAs, HEATFs, and other traditional soft magnetic films, such as amorphous/nanocrystalline films and nano‐granular films (comparison only with materials that are characterized by M S , H C , and ρ ). [ 4,21,27,32,36,90–113 ] A material with ρ > 150 µΩ·cm can be considered as a high‐resistance material (above the black‐dotted line in the figure). The electrical resistivities of the CoCrFeNi‐based HEATFs are higher than 150 µΩ·cm, indicating that these electrical resistivities are twice that of the bulk HEAs and amorphous/nanocrystalline films.…”

Section: Advantages Of the Core–shell Structure For The Magnetic Prop...mentioning

confidence: 99%

“…Soft magnetic‐performance parameters ( M S / H C )–electrical resistivity ( ρ ) profiles of the investigated CoCrFeNi‐based HEATFs compared to those of bulk HEAs, other HEATFs and transitional thin films. [ 4,21,27,32,36,90–113 ] …”

Section: Advantages Of the Core–shell Structure For The Magnetic Prop...mentioning

confidence: 99%

Native Oxidation and Complex Magnetic Anisotropy‐Dominated Soft Magnetic CoCrFeNi‐Based High‐Entropy Alloy Thin Films

Zhang

Wang

et al. 2022

Advanced Science

View full text Add to dashboard Cite

Soft magnetic high-entropy alloy thin films (HEATFs) exhibit remarkable freedom of material-structure design and physical-property tailoring, as well as, high cut-off frequencies and outstanding electrical resistivities, making them potential candidates for high-frequency magnetic devices. In this study, a CoCrFeNi film with excellent soft magnetic properties is developed by forming a novel core-shell structure via native oxidation, with ferromagnetic elements Fe, Co, and Ni as the core and the Cr oxide as the shell layer. The core-shell structure enables a high saturation magnetization, enhances the electrical resistivity, and thus reduces the eddy-current loss. For further optimizing the soft magnetic properties, O is deliberately introduced into the HEATFs, and the O-incorporated HEATFs exhibit an electrical resistivity of 237 μ𝛀•cm, a saturation magnetization of 535 emu cm −3 , and a coercivity of 23 A m −1 . The factors that determine the ferromagnetism and coercivity of the CoCrFeNi-based HEATFs are examined in detail by evaluating the microstructures, magnetic domains, chemical valency, and 3D microscopic compositional distributions of the prepared films. These results are anticipated to provide insights into the magnetic behaviors of soft magnetic HEATFs, as well as aid in the construction of a promising material-design strategy for these unique materials.

show abstract

Magnetic annealing of plated high saturation magnetization soft magnetic FeCo alloy films

Cited by 12 publications

References 7 publications

Curvature and Stress Effects on the Performance of Contour‐Mode Resonant ΔE Effect Magnetometers

Curvature and Stress Effects on the Performance of Contour‐Mode Resonant ΔE Effect Magnetometers

Effect of Pt doping on the preferred orientation enhancement in FeCo/SiO2 nanocomposite films

Native Oxidation and Complex Magnetic Anisotropy‐Dominated Soft Magnetic CoCrFeNi‐Based High‐Entropy Alloy Thin Films

Contact Info

Product

Resources

About