Inverted hysteresis loops in annealed Co–Nb–Zr and Co–Fe–Mo–Si–B amorphous thin films

Valvidares, Manuel; Martin, James I.; Álvarez-Prado, L. M.; Pain, D.; Acher, O.; Suran, G.; Alameda, J. M.

doi:10.1016/s0304-8853(01)01195-7

Cited by 13 publications

(5 citation statements)

References 8 publications

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“…Models and theories have been proposed to explain the observed NRM. For example, NRM in Ag/Ni multilayer films4 and granular (Ni, Fe)-SiO 2 films5 was explained by magnetostatic interaction; NRM in YCo 2 /YCo 2 (Fe 10 Ni 90 /Fe 10 Ni 90 ) polycrystal bilayer films and CoNbZr (CoFeMoSiB) amorphous single layer films were explained by competing uniaxial (biaxial) and uniaxial anisotropies1011, which was later extended to competing cubic and uniaxial anisotropies1213; NRM in Cr 2 O 3 coated CrO 2 particles14, and a randomly distributed Co NP system15 was explained by dipolar interactions between ferromagnetic and superparamagnetic particles.…”

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confidence: 99%

Physical Justification for Negative Remanent Magnetization in Homogeneous Nanoparticles

Zhang

et al. 2014

Sci Rep

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The phenomenon of negative remanent magnetization (NRM) has been observed experimentally in a number of heterogeneous magnetic systems and has been considered anomalous. The existence of NRM in homogenous magnetic materials is still in debate, mainly due to the lack of compelling support from experimental data and a convincing theoretical explanation for its thermodynamic validation. Here we resolve the long-existing controversy by presenting experimental evidence and physical justification that NRM is real in a prototype homogeneous ferromagnetic nanoparticle, an europium sulfide nanoparticle. We provide novel insights into major and minor hysteresis behavior that illuminate the true nature of the observed inverted hysteresis and validate its thermodynamic permissibility and, for the first time, present counterintuitive magnetic aftereffect behavior that is consistent with the mechanism of magnetization reversal, possessing unique capability to identify NRM. The origin and conditions of NRM are explained quantitatively via a wasp-waist model, in combination of energy calculations.

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confidence: 99%

Physical Justification for Negative Remanent Magnetization in Homogeneous Nanoparticles

Zhang

et al. 2014

Sci Rep

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“…For example, the inverted hysteresis loops were found in Co-CoO systems [14] and Co thin films of thickness o60 nm [15,16]; in Ag/Ni multilayers [17] and (Ni, Fe)-SiO 2 granular films [18,19]; in the epitaxial Fe (1 1 1) films [20]; in Co/Pt/Gd/Pt [21] and FeAu superlattices [22]; in the Co-Nb-Zr and CoFeMoSiB films; in amorphous YCo 2 /YCo 2 bilayers; in polycrystalline FeNi/FeNi samples [23,24]. The all-foregoing systems mainly consist of layered structures with well-defined interfaces between layers.…”

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confidence: 99%

Inverted near-surface hysteresis loops in annealed Fe80.5Nb7B12.5 ribbons

Shalyguina

Molokanov

Komarova

et al. 2005

Journal of Magnetism and Magnetic Materials

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“…The study of magnetic hysteresis loops in ferromagnetic thin films where IHL was observed [15][16][17], is based on the assumption that there is a uniaxial anisotropy in the longitudinal direction which is mostly explained by the Stoner-Wohlfarth model [18]. An extended explanation was given by Arrot who studied ultra-thin magnetic films and found certain similarities in the magnetic properties of thin films with the nanoparticle systems [19,20].…”

Section: Inverted Hysteresis Loops Effectmentioning

confidence: 99%

The inverted hysteresis loops and exchange bias effects in amorphous/nanocrystalline Fe72Cu1V4Si15B8 ribbons at room temperature

et al. 2020

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?he influence of thermally induced microstructural transformations on magnetic properties of Fe72Cu1V4Si15B8 ribbon with combined amorphous/nanocrystalline structure is presented. The experiments showed that thermally induced structural changes are in correlation with the appearance of magnetic hysteresis, i.e. with inverted hysteresis loops (IHL) and exchange bias (EB) effects. It was found that the ratio of surface to volume of a ribbon sample have an influence on hysteresis loop appearance. The inverted hysteresis loops were observed for the 1.5 mm wide and 55 ?m thick alloy samples shorter than 10 mm, but for the samples longer than 10 mm hysteresis loops were normal. With an increase of annealing temperature, a shift of the hysteresis loops measured at room temperature was noticed. The highest positive exchange bias field Heb was observed for the sample annealed at 723 K, together with the lowest magnetic field at which the changes from inverted to normal hysteresis loop occurred. Annealing at the temperature of 823 K resulted in negative Heb.

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Inverted hysteresis loops in annealed Co–Nb–Zr and Co–Fe–Mo–Si–B amorphous thin films

Cited by 13 publications

References 8 publications

Physical Justification for Negative Remanent Magnetization in Homogeneous Nanoparticles

Physical Justification for Negative Remanent Magnetization in Homogeneous Nanoparticles

Inverted near-surface hysteresis loops in annealed Fe80.5Nb7B12.5 ribbons

The inverted hysteresis loops and exchange bias effects in amorphous/nanocrystalline Fe72Cu1V4Si15B8 ribbons at room temperature

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