Off-stoichiometric ([Formula: see text][Formula: see text])([Formula: see text]) MnO3 manganite was studied with in-phase (real, [Formula: see text]) and out-of-phase (imaginary, [Formula: see text]) components of ac susceptibility measurements. Short- and long-time relaxation effects, manifested by the revealed negative [Formula: see text], were observed. The effects are explained at the frame of Landau theory of phase transitions where a coexistence of stable and metastable states is considered. It is supposed that the appearance of negative [Formula: see text] is an intrinsic feature of magnetic materials with impurities, defects and vacancies blocking nucleation and growth of new phase.

中文翻译：

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La0.6Sr0.35MnTi0.05O3中交流磁化率、亚稳态和磁弛豫的负虚部

非化学计量（[公式：见正文][公式：见正文]）（[公式：见正文]）MnO3亚锰酸盐是用交流磁化率测量的同相（实数，[公式：参见文本]）和异相（虚构，[公式：参见文本]）分量进行研究的。观察到短期和长期的放松效果，表现为负面的[公式：见正文]。在考虑稳定和亚稳态共存的朗道相变理论框架下解释了这些影响。推测负[式：见正文]的出现是磁性材料的固有特征，杂质、缺陷和空位阻碍了新相的形核和生长。