Interdiffusion in bilayer CoPt/Co films: potential for tailoring the magnetic exchange spring

Crew, D.C.; Kim, J.; Lewis, L. H.; Barmak, K.

doi:10.1016/s0304-8853(01)00277-3

Cited by 48 publications

(41 citation statements)

References 20 publications

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“…Furthermore, a single-magnetic-hard-phase behavior can be found in nanocomposite PM consisting of magnetic hard and soft phases, in which the magnetization vector of soft phase is aligned with that of the hard phase by IGEC [7,[13][14][15][16][17]. Because of m r above 1 2 ; a higher ðBHÞ max would be expected in nanocrystalline PM.…”

Section: Introductionmentioning

confidence: 98%

Investigation on the coercivity and remanence of single-phase nanocrystalline permanent magnets by micromagnetic finite-element method

Zhang

Rong

et al. 2004

Journal of Magnetism and Magnetic Materials

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Section: Introductionmentioning

confidence: 98%

Investigation on the coercivity and remanence of single-phase nanocrystalline permanent magnets by micromagnetic finite-element method

Zhang

Rong

et al. 2004

Journal of Magnetism and Magnetic Materials

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“…A wealth of different soft/hard materials has been investigated in the literature (see, e.g., [4][5][6][7][8][9][10]). Experimentally, the Fe/FePt system is a highly suitable system for studying the fundamental properties of nano-composite magnetic systems as the properties are relatively easy to control [11].…”

Section: Introductionmentioning

confidence: 99%

Exchange coupling and magnetic anisotropy at Fe/FePt interfaces

Hasnip

Cuadrado

et al. 2013

Phys. Rev. B

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We perform fully relativistic first principles calculations of the exchange interactions and the magnetocrystalline anisotropy energy (MAE) in an Fe/FePt/Fe sandwich system in order to elucidate how the presence of Fe/FePt (soft/hard magnetic) interfaces impacts on the magnetic properties of Fe/FePt/Fe multilayers. Throughout our study we make comparisons between a geometrically unrelaxed system and a geometrically relaxed system. We observe that the Fe layer at the Fe/FePt interface plays a crucial role inasmuch its (isotropic) exchange coupling to the soft (Fe) phase of the system is substantially reduced. Moreover, this interfacial Fe layer has a substantial impact on the MAE of the system. We show that the MAE of the FePt slab, including the contribution from the Fe/FePt interface, is dominated by anisotropic inter-site exchange interactions. Our calculations indicate that the change in the MAE of the FePt slab with respect to the corresponding bulk value is negative, i.e., the presence of Fe/FePt interfaces appears to reduce the perpendicular MAE of the Fe/FePt/Fe system. However, for the relaxed system, this reduction is marginal. It is also shown that the relaxed system exhibits a reduced interfacial exchange. Using a simple linear chain model we demonstrate that the reduced exchange leads to a discontinuity in the magnetisation structure at the interface.

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“…For the bilayer annealed at 650 ºC, the M-H loop indicates a clear one step hysteresis loop with highest 4πM S . This gives an indication that the two individual layers have a tendency of getting mixed up when annealing temperature exceeds 350 ºC [12]. Another interesting feature seen from Fig.2 pertains to the closing of the M-H loops of the samples.…”

Section: Resultsmentioning

confidence: 81%

Magnetic and FMR Study on CoFe$_{2}$O$_{4}$/ZnFe$_{2}$O$_{4}$ Bilayers

et al. 2013

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CoFe 2 O 4 /ZnFe 2 O 4 bilayers were deposited by the pulsed laser deposition technique on amorphous fused quartz substrate at substrate temperatures of 350 ºC and in oxygen pressure of 0.16 mbar. The films were studied after ex-situ annealing for 2 hrs in air at various temperatures up to 650 ºC. The magnetic properties of the bilayer were studied at 300 K and at 10 K. Ferromagnetic resonance was carried out at x-band frequencies at room temperature. It was found that as a result of annealing, the diffusion between Co-ferrite and Zn ferrite starts around 350 o C and leads to a large line width system having magnetization, which remains undetected by FMR.

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Interdiffusion in bilayer CoPt/Co films: potential for tailoring the magnetic exchange spring

Cited by 48 publications

References 20 publications

Investigation on the coercivity and remanence of single-phase nanocrystalline permanent magnets by micromagnetic finite-element method

Investigation on the coercivity and remanence of single-phase nanocrystalline permanent magnets by micromagnetic finite-element method

Exchange coupling and magnetic anisotropy at Fe/FePt interfaces

Magnetic and FMR Study on CoFe$_{2}$O$_{4}$/ZnFe$_{2}$O$_{4}$ Bilayers

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