Scanning Probe Manipulation of Magnetism at the LaAlO3/SrTiO3 Heterointerface

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• 作者：Beena Kalisky ; Julie A. Bert ; Christopher Bell ; Yanwu Xie ; Hiroki K. Sato ; Masayuki Hosoda ; Yasuyuki Hikita ; Harold Y. Hwang ; Kathryn A. Moler
• 刊名：Nano Letters
• 出版年：2012
• 出版时间：August 8, 2012
• 年：2012
• 卷：12
• 期：8
• 页码：4055-4059
• 全文大小：286K
• 年卷期：v.12,no.8(August 8, 2012)
• ISSN：1530-6992

文摘

Manipulation of magnetism is a longstanding goal of research in exotic materials. In this work, we demonstrate that the small ferromagnetic patches in LaAlO₃/SrTiO₃ heterostructures can be dramatically changed by in situ contact of a scanning probe. Our results provide a platform for manipulation of small magnets through either a strong magneto-elastic coupling or sensitivity to surface modification. The ability to locally control magnetism is particularly interesting due to the presence of superconductivity with strong spin鈥搊rbit coupling in LaAlO₃/SrTiO₃.

Keywords:

Heterointerfaces; complex oxides; magnetism; scanning SQUID microscopy