Current-driven magnetization decrease in single crystalline ferromagnetic manganese oxide
A. Wahl, Ch. Simon, S. Mercone, D. Saurel, C. Martin
Abstract
The electrical and magnetic response to a bias current has been investigated in a singlecrystalline ferromagnetic manganese oxide 0.8Ca0.2MnO3 . A significant decrease of the magnetization is observed at the same threshold current where a non-linearity of V-I characteristics appears. Such a behavior cannot be understood in the framework of the filamentary picture usually invoked for the non linearity of the other manganese oxides. Instead, an analogy with spintronic features might be useful and experimental signatures seem to be in agreement with excitations of spin waves by an electric current. This provides an example of a bulk system in which the spin polarized current induces a macroscopic change in the magnetization.
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