Preparation and properties of Mg-Fe nanocomposite.

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Preparation and properties of Mg-Fe nanocomposite.

Popis výsledku v původním jazyce

Mg-Fe nanocomposite was prepared using spark synthesis of pure Mg and Fe electrodes. The as-prepared powder was separated into two parts using a magnetic separation and a sedimentation procedure. The nanocrystalline powder (paramagnetic at room temperature) was analysed using x-ray diffraction and Mössbauer spectroscopy. From the x-ray diffraction measurements Mg, MgO, and a-Fe were recognized. According to the Mössbauer spectra analysis, iron atoms were identified in following phases: a-Fe, Fe in Mg, and FeO. The FeO was probably present as MgO-FeO solid solution and not recognized by x-ray diffraction. The Fe in Mg phase was represented in the Mössbauer spectra as two doublets with isomer shifts d1=0.16 0.02 and d2=0.43 0.01 mm/s relative to a-Fe andquadrupole splittings s1=0.84 0.02 and s2=0.80 0.01 mm/s. Low temperature magnetic measurements showed spin-glass like behaviour of the powder. Annealing in vacuum (10-3 Pa) or in the protective atmosphere (H2) caused transformation of t

Název v anglickém jazyce

Preparation and properties of Mg-Fe nanocomposite.

Popis výsledku anglicky

Mg-Fe nanocomposite was prepared using spark synthesis of pure Mg and Fe electrodes. The as-prepared powder was separated into two parts using a magnetic separation and a sedimentation procedure. The nanocrystalline powder (paramagnetic at room temperature) was analysed using x-ray diffraction and Mössbauer spectroscopy. From the x-ray diffraction measurements Mg, MgO, and a-Fe were recognized. According to the Mössbauer spectra analysis, iron atoms were identified in following phases: a-Fe, Fe in Mg, and FeO. The FeO was probably present as MgO-FeO solid solution and not recognized by x-ray diffraction. The Fe in Mg phase was represented in the Mössbauer spectra as two doublets with isomer shifts d1=0.16 0.02 and d2=0.43 0.01 mm/s relative to a-Fe andquadrupole splittings s1=0.84 0.02 and s2=0.80 0.01 mm/s. Low temperature magnetic measurements showed spin-glass like behaviour of the powder. Annealing in vacuum (10-3 Pa) or in the protective atmosphere (H2) caused transformation of t

Druh

D - Stať ve sborníku

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2001

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

First Seeheim Conference on Magnetism SCM2001 - Program and Abstracts.

ISBN

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ISSN

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e-ISSN

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Počet stran výsledku

1

Strana od-do

105

Název nakladatele

University of Darmstadt

Místo vydání

Darmstadt

Místo konání akce

Seeheim [DE]

Datum konání akce

9. 9. 2001

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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