Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore-560012, India.
Sci Rep. 2013;3:1433. doi: 10.1038/srep01433.
Mn-doped SrTiO(3.0), when synthesized free of impurities, is a paramagnetic insulator with interesting dielectric properties. Since delocalized charge carriers are known to promote ferromagnetism in a large number of systems via diverse mechanisms, we have looked for the possibility of any intrinsic, spontaneous magnetization by simultaneous doping of Mn ions and electrons into SrTiO3 via oxygen vacancies, thereby forming SrTi(1-x)Mn(x)O(3-δ), to the extent of making the doped system metallic. We find an absence of any enhancement of the magnetization in the metallic sample when compared with a similarly prepared Mn doped, however, insulating sample. Our results, thus, are not in agreement with a recent observation of a weak ferromagnetism in metallic Mn doped SrTiO3 system.
当 Mn 掺杂 SrTiO(3.0)在没有杂质的情况下合成时，它是一种具有有趣介电性质的顺磁绝缘体。由于已知离域电荷载流子通过多种机制促进许多系统中的铁磁性，我们通过氧空位同时将 Mn 离子和电子掺杂到 SrTiO3 中，从而形成 SrTi(1-x)Mn(x)O(3-δ)，以使掺杂系统金属化，从而寻找任何内在的、自发磁化的可能性。与同样制备的 Mn 掺杂、但绝缘的样品相比，我们发现金属样品的磁化强度没有任何增强。因此，我们的结果与最近在金属 Mn 掺杂 SrTiO3 系统中观察到的弱铁磁性不一致。
