Effects of combined current injection and laser irradiation on Permalloy microwire switching
Combined field- and current-induced domain wall (DW) motion in Permalloy microwires is studied using fast magneto-optical Kerr-microscopy. On increasing the current density, we find a decrease of Kerr signal contrast, corresponding to a reduction in the magnetization, which is attributed to Joule he...
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| Veröffentlicht in: | Applied physics letters 2009-11, Vol.95 (21), p.212502-212502-3 |
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| container_end_page | 212502-3 |
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| container_issue | 21 |
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| container_title | Applied physics letters |
| container_volume | 95 |
| creator | Franken, J. H. Möhrke, P. Kläui, M. Rhensius, J. Heyderman, L. J. Thiele, J.-U. Swagten, H. J. M. Gibson, U. J. Rüdiger, U. |
| description | Combined field- and current-induced domain wall (DW) motion in Permalloy microwires is studied using fast magneto-optical Kerr-microscopy. On increasing the current density, we find a decrease of Kerr signal contrast, corresponding to a reduction in the magnetization, which is attributed to Joule heating of the sample. Resistance measurements on samples with varying substrates confirm that the Curie temperature is reached when the magneto-optical contrast vanishes and reveal the importance of the heat flow into the substrate. By tuning the laser power, DWs can be pinned in the laser spot, which can thus act as a flexible pinning site for DW devices. |
| doi_str_mv | 10.1063/1.3265944 |
| format | Article |
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H. ; Möhrke, P. ; Kläui, M. ; Rhensius, J. ; Heyderman, L. J. ; Thiele, J.-U. ; Swagten, H. J. M. ; Gibson, U. J. ; Rüdiger, U.</creator><creatorcontrib>Franken, J. H. ; Möhrke, P. ; Kläui, M. ; Rhensius, J. ; Heyderman, L. J. ; Thiele, J.-U. ; Swagten, H. J. M. ; Gibson, U. J. ; Rüdiger, U.</creatorcontrib><description>Combined field- and current-induced domain wall (DW) motion in Permalloy microwires is studied using fast magneto-optical Kerr-microscopy. On increasing the current density, we find a decrease of Kerr signal contrast, corresponding to a reduction in the magnetization, which is attributed to Joule heating of the sample. Resistance measurements on samples with varying substrates confirm that the Curie temperature is reached when the magneto-optical contrast vanishes and reveal the importance of the heat flow into the substrate. 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Resistance measurements on samples with varying substrates confirm that the Curie temperature is reached when the magneto-optical contrast vanishes and reveal the importance of the heat flow into the substrate. 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J.</au><au>Rüdiger, U.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of combined current injection and laser irradiation on Permalloy microwire switching</atitle><jtitle>Applied physics letters</jtitle><date>2009-11-23</date><risdate>2009</risdate><volume>95</volume><issue>21</issue><spage>212502</spage><epage>212502-3</epage><pages>212502-212502-3</pages><issn>0003-6951</issn><eissn>1077-3118</eissn><coden>APPLAB</coden><abstract>Combined field- and current-induced domain wall (DW) motion in Permalloy microwires is studied using fast magneto-optical Kerr-microscopy. On increasing the current density, we find a decrease of Kerr signal contrast, corresponding to a reduction in the magnetization, which is attributed to Joule heating of the sample. Resistance measurements on samples with varying substrates confirm that the Curie temperature is reached when the magneto-optical contrast vanishes and reveal the importance of the heat flow into the substrate. By tuning the laser power, DWs can be pinned in the laser spot, which can thus act as a flexible pinning site for DW devices.</abstract><cop>United States</cop><pub>American Institute of Physics</pub><doi>10.1063/1.3265944</doi><oa>free_for_read</oa></addata></record> |
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| ispartof | Applied physics letters, 2009-11, Vol.95 (21), p.212502-212502-3 |
| issn | 0003-6951 1077-3118 |
| language | eng |
| recordid | cdi_osti_scitechconnect_21294473 |
| source | AIP Journals Complete; AIP Digital Archive; Alma/SFX Local Collection |
| subjects | CURIE POINT CURRENT DENSITY ELECTRIC CONDUCTIVITY HEAT FLUX JOULE HEATING LASER RADIATION MAGNETIZATION MATERIALS SCIENCE OPTICAL MICROSCOPY PERMALLOY SUBSTRATES |
| title | Effects of combined current injection and laser irradiation on Permalloy microwire switching |
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