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<p class="MsoNormal"><span style="font-family:"Georgia","serif"">Please join us on Thursday, March 27th at
<b>3:30pm </b>in<b> 4138 PRB</b> for a Condensed Matter Seminar presented by Georg Schmidt from Martin Luther University Halle-Wittenberg (MLU). The title and abstract for his talk are listed below.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Georgia","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-family:"Georgia","serif"">"Voltage controlled tunnel barriers in organic spin valves based on tunneling anisotropic magnetoresistance"<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-family:"Georgia","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-family:"Georgia","serif"">ABSTRACT:</span></b><span style="font-family:"Georgia","serif""> We demonstrate that in an organic spin valve with a La0.7Sr0.3MnO3 (LSMO) electrode and a non-magnetic counter electrode voltage
pulses can change the resistance by almost two orders of magnitude. Additionally tunneling anisotropic magnetoresistance (TAMR) up to 17% can be observed. Our experiments show that the width and height of the injection barrier between the LSMO and the organic
semiconductor are changed by applied voltage pulses. Our observations can be explained by the creation of oxygen vacancies in the LSMO whose spatial distribution can be modified by electric fields. Large reverse voltages can reset the device to its original
state.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Georgia","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Georgia","serif"">Thank you,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Georgia","serif"">Trisch<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><img width="224" height="45" id="Picture_x0020_1" src="cid:image001.png@01CF48FC.2CABD190" alt="The Ohio State University"><br>
<b><span style="color:#C00000">Trisch Longbrake</span></b><o:p></o:p></p>
<p class="MsoNormal">Administrative Associate I<br>
<span style="color:#C00000">Department of Physics</span> Condensed Matter<br>
2196 Physics Research Building, 191 W. Woodruff Ave., Columbus, OH 43210<br>
614-292-2778 Office / 614-292-7557 Fax<br>
<a href="mailto:longbrake.6@osu.edu">longbrake.6@osu.edu</a> <a href="http://osu.edu/">
osu.edu</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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