Magnetically Tunable Metal–Insulator Superlattices (pages 500–504)
Masao Nakamura, Daisuke Okuyama, Jong Seok Lee, Taka-hisa Arima, Yusuke Wakabayashi, Reiji Kumai, Masashi Kawasaki and Yoshinori Tokura
Version of Record online: 2 NOV 2009 | DOI: 10.1002/adma.200902734
Design and control of nanometer-scale electronic phase separation are demonstrated in high-quality manganite superlattices composed of a ferromagnetic metal and an antiferromagnetic insulator (see figure). Bicritical competition of these phases sensitively controls the magnetic and electronic properties of the superlattices as a whole. A magnetic field can effectively tune the volume fraction of each phase and consequently the position of the phase domain boundaries.