Mishra, A. K. ; Bansal, C. ; Ghafari, M. ; Kruk, R. ; Hahn, H. (2010)
Tuning properties of nanoporous Au-Fe alloys by electrochemically induced surface charge variations.
In: Physical Review B, 81 (15)
doi: 10.1103/PhysRevB.81.155452
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The behavior of strain, magnetization, and resistivity of a nanoporous Au0.55Fe0.45 alloy was studied in situ during electrochemically induced charge variations on the surface of the alloy. The length of the sample varied reversibly over several cycles of charging and decharging and a maximum fractional length change of 0.14 percent was observed for an induced surface charge of 15 micro-Coulombs/cm2. The change in magnetization with induced surface charge was dependent on the applied magnetic field and a reversible variation in magnetization of 0.2 percent was observed at the highest applied magnetic field of 6 Tesla. The electrical conductivity could be reversibly changed by 2.5 percent due to the charge induced on the sample. In situ Mössbauer spectra recorded during charging and decharging also showed a systematic variation in quadrupole splitting. An attempt is made to explain the observed changes in physical properties quantitatively in terms of the additional charge that is accumulated on the surface of the nanoporous system.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2010 |
| Autor(en): | Mishra, A. K. ; Bansal, C. ; Ghafari, M. ; Kruk, R. ; Hahn, H. |
| Art des Eintrags: | Bibliographie |
| Titel: | Tuning properties of nanoporous Au-Fe alloys by electrochemically induced surface charge variations |
| Sprache: | Englisch |
| Publikationsjahr: | 27 April 2010 |
| Verlag: | American Physical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review B |
| Jahrgang/Volume einer Zeitschrift: | 81 |
| (Heft-)Nummer: | 15 |
| DOI: | 10.1103/PhysRevB.81.155452 |
| Kurzbeschreibung (Abstract): | The behavior of strain, magnetization, and resistivity of a nanoporous Au0.55Fe0.45 alloy was studied in situ during electrochemically induced charge variations on the surface of the alloy. The length of the sample varied reversibly over several cycles of charging and decharging and a maximum fractional length change of 0.14 percent was observed for an induced surface charge of 15 micro-Coulombs/cm2. The change in magnetization with induced surface charge was dependent on the applied magnetic field and a reversible variation in magnetization of 0.2 percent was observed at the highest applied magnetic field of 6 Tesla. The electrical conductivity could be reversibly changed by 2.5 percent due to the charge induced on the sample. In situ Mössbauer spectra recorded during charging and decharging also showed a systematic variation in quadrupole splitting. An attempt is made to explain the observed changes in physical properties quantitatively in terms of the additional charge that is accumulated on the surface of the nanoporous system. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 15 Feb 2013 10:04 |
| Letzte Änderung: | 05 Mär 2013 10:05 |
| PPN: | |
| Sponsoren: | The financial support of the DST �India�-DAAD �Germany� project based personnel exchange program and of the Deutsche Forschungsgemeinschaft �DFG� is acknowledged. |
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