Influence of seed layer on magnetic properties of laminated Co65Fe35 films

Ladak, Sam; Fernandez-Outon, L.E.; O'Grady, K.

doi:10.1063/1.2832436

Cited by 8 publications

(5 citation statements)

References 6 publications

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“…8 Coercivity of magnetic thin films can also be tailored by depositing films on seed layers. 9 Recently we reported the modification of the magnetic properties in Fe based nanocrystalline alloys by thermal annealing. 10 In thin magnetic films, the surface roughness plays an important role in the magnetization reversal mechanisms and this in turn determines the coercivity of the material.…”

Section: Swift Heavy Ion Induced Surface Modification For Tailoring Cmentioning

confidence: 99%

Swift heavy ion induced surface modification for tailoring coercivity in Fe–Ni based amorphous thin films

Thomas

Avasthi

et al. 2009

Journal of Applied Physics

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Fe–Ni based amorphous thin films were prepared by thermal evaporation. These films were irradiated by 108 MeV Ag8+ ions at room temperature with fluences ranging from 1×1012 to 3×1013 ions/cm2 using a 15 UD Pelletron accelerator. Glancing angle x-ray diffraction studies showed that the irradiated films retain their amorphous nature. The topographical evolution of the films under swift heavy ion (SHI) bombardment was probed using atomic force microscope and it was noticed that surface roughening was taking place with ion beam irradiation. Magnetic measurements using a vibrating sample magnetometer showed that the coercivity of the films increases with an increase in the ion fluence. The observed coercivity changes are correlated with topographical evolution of the films under SHI irradiation. The ability to modify the magnetic properties via SHI irradiation could be utilized for applications in thin film magnetism.

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Section: Swift Heavy Ion Induced Surface Modification For Tailoring Cmentioning

confidence: 99%

Swift heavy ion induced surface modification for tailoring coercivity in Fe–Ni based amorphous thin films

Thomas

Avasthi

et al. 2009

Journal of Applied Physics

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“…A reduction in grain size transforms the domain distribution from a multidomain (MD) to single domain (SD) regime, leading to a magnetism transition from a ferromagnetic (FM) to superparamagnetic (SP) state. ,, In this process, the grain dimensionality evolves from large planar grains to nanoparticles, separated by nonmagnetic grain boundaries. Conventionally, grain size was controlled through various preparation techniques, including controlled film growth, , heat treatments, , and the utilization of seed layers. , Nevertheless, the grain dimensionality and magnetic properties obtained through these techniques are fixed upon fabrication and cannot be tuned at the device level.…”

Section: Introductionmentioning

confidence: 99%

“…Conventionally, grain size was controlled through various preparation techniques, including controlled film growth, 8,9 heat treatments, 10,11 and the utilization of seed layers. 12,13 Nevertheless, the grain dimensionality and magnetic properties obtained through these techniques are fixed upon fabrication and cannot be tuned at the device level. Electric field control of magnetic properties is of particular interest in the field of spintronics.…”

Section: Introductionmentioning

confidence: 99%

Electrical Control Grain Dimensionality with Multilevel Magnetic Anisotropy

Li,

Bhatti,

Teo

et al. 2024

ACS Nano

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In alignment with the increasing demand for larger storage capacity and longer data retention, the electrical control of magnetic anisotropy has been a research focus in the realm of spintronics. Typically, magnetic anisotropy is determined by grain dimensionality, which is set during the fabrication of magnetic thin films. Despite the intrinsic correlation between magnetic anisotropy and grain dimensionality, there is a lack of experimental evidence for electrically controlling grain dimensionality, thereby impairing the efficiency of magnetic anisotropy modulation. Here, we demonstrate an electric field control of grain dimensionality and prove it as the active mechanism for tuning interfacial magnetism. The reduction in grain dimensionality is associated with a transition from ferromagnetic to superparamagnetic behavior. We achieve a nonvolatile and reversible modulation of the coercivity in both the ferromagnetic and superparamagnetic regimes. Subsequent electrical and elemental analysis confirms the variation in grain dimensionality upon the application of gate voltages, revealing a transition from a multidomain to a single-domain state, accompanied by a reduction in grain dimensionality. Furthermore, we exploit the influence of grain dimensionality on domain wall motion, extending its applicability to multilevel magnetic memory and synaptic devices. Our results provide a strategy for tuning interfacial magnetism through grain size engineering for advancements in high-performance spintronics.

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“…Except for the above methods, to deposit an underlayer is actually a very common and effective method for tuning the soft magnetic properties of sputtered thin films [10][11][12][13][14][15][16][17][18][19][20][21]. The improvements can be very obvious, especially on the thin films with large magnetostrictions, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…FeCo films [10][11][12][13][14]. With proper underlayers, some reports even find that for granular thin films [15,16,20] and laminated films [21], the soft magnetic properties can still be improved. For most normal metal underlayers, the improvements in the soft magnetic properties are attributed to the modification of the film's texture and the decrease in crystal sizes [10][11][12][13][14]20].…”

Section: Introductionmentioning

confidence: 99%

Influence of Cu underlayer on the high-frequency magnetic characteristics of as-sputtered FeCoSiN granular thin films

Xu¹,

Zhang²,

Ma³

et al. 2008

J. Phys. D: Appl. Phys.

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In this work, we investigate the influence of Cu underlayers on the magnetic properties of as-sputtered FeCoSiN thin films. Different from their traditional improvement in the static magnetic properties of sputtered films, Cu underlayers are found to have a significant influence on the dynamic magnetic properties of as-sputtered FeCoSiN thin film at high frequencies. The permeability spectra and the analyses based on the Landau–Lifshitz–Gilbert equation show that the damping coefficient in the magnetization dynamics significantly increases with the underlayer's thickness, and thus the resonant frequency linewidth increases. The extent of increase shows that using the Cu underlayer is an effective method for tuning the damping in the magnetization dynamics of granular thin films. The increase in the damping coefficient is suggested to be related to the release of the film's stress by the underlayer.

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Influence of seed layer on magnetic properties of laminated Co65Fe35 films

Cited by 8 publications

References 6 publications

Swift heavy ion induced surface modification for tailoring coercivity in Fe–Ni based amorphous thin films

Swift heavy ion induced surface modification for tailoring coercivity in Fe–Ni based amorphous thin films

Electrical Control Grain Dimensionality with Multilevel Magnetic Anisotropy

Influence of Cu underlayer on the high-frequency magnetic characteristics of as-sputtered FeCoSiN granular thin films

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