J. M. Riveiro
University of Castilla–La Mancha
53 Papers
381 Citations
J. M. Riveiro is an academic researcher from University of Castilla–La Mancha. The author has contributed to research in topics: Magnetization & Magnetic nanoparticles. The author has an hindex of 18, co-authored 53 publications.
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Papers
Spin-glass-like behavior in mechanically alloyed nanocrystalline Fe-Al-Cu
J. A. De Toro,M. A. López de la Torre,J. M. Riveiro,R. Saez Puche,A. Gómez-Herrero,L.C. Otero-Díaz +5 more
TL;DR: In this paper, the magnetic properties of mechanically alloyed materials have been investigated and it was shown that the irreversibility between the field-cooled and zero-fieldcooled magnetization curves closely resemble those exhibited by spin glasses.
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Exchange bias and nanoparticle magnetic stability in Co-CoO composites
TL;DR: In this article, a series of Co{sub x}(CoO){sub 1-x} thin films have been synthesized by sputtering Co in an oxygen atmosphere using different rf sputtering powers as a means to vary the concentration x.
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Interdiffusion up to the eutectic composition and vitrification in Gd/Co multilayers
TL;DR: In this article, the authors performed structural experiments on Gd/Co multilayers and bilayers and found that Co diffuses throughout the Gd layers and forms a Gd1−xCox amorphous alloy (x=0.29-0.37).
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Effect of interstitial oxygen on the crystal structure and magnetic properties of Ni nanoparticles
TL;DR: The structure and magnetic properties of fine Ni nanoparticles (∼65nm diameter) having a spontaneous surface oxide layer have been studied in this article, where the particles were prepared by the chemical reduction of nickel ions in an aqueous medium, with sodium borohydride as the reducing agent X-ray diffraction (XRD), transmission electron microscopy, and magnetization measurements (M-H plots and field cooled∕zero field cooled curves) have been used for characterizing the samples No detectable change is observed in the M-H curves or in the X
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Nonequilibrium magnetic dynamics in mechanically alloyed materials
J. A. De Toro,M. A. López de la Torre,M. A. Arranz,J. M. Riveiro,José Luis Martínez,P. Palade,G. Filoti +6 more
TL;DR: The magnetically glassy behavior of mechanically alloyed samples was investigated in detail in this paper, including a static and dynamic study of the freezing process, the observation of aging in a mechanically Alloyed sample, M\"ossbauer analysis, and annealing experiments.
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