Hydrogen induced magnetic-phase transformation in Fe90Zr10 glass

Wroński, Z.; Morrish, A. H.; Stewart, Andrew

doi:10.1016/0375-9601(84)90875-2

Cited by 22 publications

(3 citation statements)

References 9 publications

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“…It has been known for some time that the introduction of hydrogen atoms into iron-rich FeZr alloys produces an increase in the Curie temperature [20].…”

Section: Interstitial Solution Of C and N Atomsmentioning

confidence: 99%

Studies of new rare-earth permanent magnets

Morrish¹,

Li²,

Zhou³

et al. 1996

J. Phys. D: Appl. Phys.

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Research on permanent magnet materials since the late 1980s at the University of Manitoba is described in the context of contemporary research elsewhere. The general objectives sought for a material to be useful as a permanent magnet are identified. The research includes atomic substitutions of the super permanent magnet , other potentially useful ternary crystal structures, interstitial solution of carbon or nitrogen atoms and composite materials. Although x-ray diffraction, magnetization and other measurements have been made over a range of temperatures, the use of Mössbauer spectroscopy has been emphasised. For example, the determination of the site occupancy by various substituted atoms has let to an atomic pair model that quantitatively describes the Curie temperatures. Recently, it has been discovered that silicon stabilizes the 2 - 17 structure and permits gas-phase reactions at temperatures of over . Composite materials are discussed in terms of some proposed models.

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“…It has been known for some time that the introduction of hydrogen atoms into iron-rich FeZr alloys produces an increase in the Curie temperature [20].…”

Section: Interstitial Solution Of C and N Atomsmentioning

confidence: 99%

Studies of new rare-earth permanent magnets

Morrish¹,

Li²,

Zhou³

et al. 1996

J. Phys. D: Appl. Phys.

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“…In particular, amorphous Fe 100−x Zr x is known to exhibit Invar characteristics [1] as well as a rich magnetic phase diagram, tunable through changes in the Zr content [2][3][4]. Hydrogen loading of Fe 100−x Zr x has also been shown to significantly influence the magnetic properties [5][6][7], highlighting the importance of subtle changes in the electronic structure for the magnetic properties. Amorphous Fe 100−x Zr x can be grown in the composition range 7 ≤ x ≤ 45 (according to Kiss [8] and Zatroch [9]) and although a ferromagnetic arrangement dominates the magnetic phase diagram, non-collinear structures and spinglass behavior have also been reported.…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of the electrical resistivity and electronic structure of amorphous Fe_100−xZr_xfilms and multilayers

Kapaklis

Pálsson

Vegelius

et al. 2012

J. Phys.: Condens. Matter

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The electrical resistivity of amorphous Fe(100-x)Zr(x) metal alloy films and multilayers has been investigated in a wide temperature and composition range. The overall behavior of the resistivity is consistent with bulk measurements, exhibiting prominent semiconductor-like changes at low temperatures. The transition from positive (metallic) to negative temperature coefficient of resistivity behavior is accompanied by minute changes in magnetoresistance and we can therefore rule out magnetic phase changes as being the cause for the observed changes in the resistivity. Using x-ray absorption and emission spectroscopies we are able to probe the unoccupied and occupied electronic densities of states. The corresponding spectra are found to significantly overlap, as expected for a metallic-like electronic structure and the absence of a band gap. Besides a broadening of the x-ray emission lines expected from an amorphous material, remarkably small differences are observed in the electronic structures when changing the amount of Zr. The resistivity data were modeled and agreement with the Mott variable range hopping model was found, indicating localized electronic states due the disordered structure of the Fe(100-x)Zr(x) alloys.

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“…Research so far has mainly focused on the effects of hydrogen uptake on several physical properties of these alloys, and a tremendous body of knowledge has accumulated in this field (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11). Recent results from measurements that concentrated o~n the achievement of the highest possible hydrogen content revealed that the residence time.…”

mentioning

confidence: 99%

Electrochemical Studies on the Potentiostatic Hydrogenation of Amorphous Fe90Zr10 and Fe91Hf9 Alloys

Kovács

Ando

Ishiwatari

et al. 1989

J. Electrochem. Soc.

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The electrochemical hydrogenation of amorphous Fe90Zr10 and Fe91Hf9 ribbons has been studied by the potentiostat polarization method. Measurements on heat‐treated Fe90Zr10 samples as well as in electrolytes of different pH have also been carried out. The hydrogen content of the charged alloys was determined by gas chromatography. It was found that, depending on the pH of the solution, the amount of hydrogen dissolved in the samples may go through a maximum due to the change in the mechanism of hydrogen evolution. A comparison between the polarization curves of the heat‐treated and prepolarized samples revealed that the surface of the ribbons may be altered significantly at high cathodic polarization, resulting in electrochemical behavior similar to that following heat‐treatment. This alteration in the state of surface, its “crystallization‐like” character, may be reflected not only by the smaller hydrogen uptake of the samples, but by the diminution of their hydrogen retaining ability as well. As a consequence of these results, the initial surface conditions of the as‐quenched alloys have also been shown to be of fundamental importance.

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Hydrogen induced magnetic-phase transformation in Fe90Zr10 glass

Cited by 22 publications

References 9 publications

Studies of new rare-earth permanent magnets

Studies of new rare-earth permanent magnets

Temperature dependence of the electrical resistivity and electronic structure of amorphous Fe_100−xZr_xfilms and multilayers

Electrochemical Studies on the Potentiostatic Hydrogenation of Amorphous Fe90Zr10 and Fe91Hf9 Alloys

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Hydrogen induced magnetic-phase transformation in Fe90Zr10 glass

Cited by 22 publications

References 9 publications

Studies of new rare-earth permanent magnets

Studies of new rare-earth permanent magnets

Temperature dependence of the electrical resistivity and electronic structure of amorphous Fe100−xZrxfilms and multilayers

Electrochemical Studies on the Potentiostatic Hydrogenation of Amorphous Fe90Zr10 and Fe91Hf9 Alloys

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Temperature dependence of the electrical resistivity and electronic structure of amorphous Fe_100−xZr_xfilms and multilayers