Figure 2: Magnetic properties.
From: Electronic phase separation at the LaAlO3/SrTiO3 interface
(a) The 1 kOe FC and ZFC in-plane magnetization (M) data as a function of temperature (T) and measured by a 0.1 kOe magnetic field applied while warming the sample from 2 to 300 K (solid black lines) for the ten unit cells of LaAlO3/SrTiO3 samples prepared at an oxygen partial pressure (PO2) of 1×10−2 mbar. In a separate measurement after ZFC, ferromagnetic hysteresis loops centred on the diamagnetic branch are observed when sweeping a ±2 kOe magnetic field applied at each temperature. Similar ferromagnetic loops are also observed on the paramagnetic branch when the hysteresis loops are collected after FC (not shown here for clarity). (b) Magnetization as a function of temperature under various cooling temperatures and magnetic fields for the ten unit cells of LaAlO3/SrTiO3 samples prepared at PO2=1×10−2 mbar. (c) The temperature-dependent ferromagnetic loops in a after diamagnetic and paramagnetic subtraction.
