搜索结果: 1-4 共查到“地球物理学 Fe”相关记录4条 . 查询时间(0.437 秒)
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铁(Fe)和镁(Mg)作为地幔中主要的组成元素可以有效地指示地幔演化和深部过程。近年来开展的地幔Fe-Mg同位素研究表明:幔源岩浆的Fe同位素差异与部分熔融程度有关,而部分熔融几乎不会导致地幔源区的Fe同位素分馏;地幔具有均一的Mg同位素组成,部分熔融过程中不发生Mg同位素分馏(图1);地幔交代作用造成的Fe-Mg同位素分馏与熔体组成和性质有关;Fe同位素分馏与氧逸度相关,Fe3+(高氧逸度)相对...
Analysis and quasistatic FE modeling of long period impulsive events associated with explosions at Stromboli volcano (Italy)
volcano seismology long-period measurements Stromboli finite element calculations volcano sources
2015/10/8
Broadband seismic measurements performed in 1995 and 1996 in the summit region of Stromboli are analyzed. The experiment in 1995 used an array of four Guralp seismometers and one Wielandt-Streckeisen ...
The strong influence of physical conditions during magma formation on Fe equilibria offers a large variety of
possibilities to deduce these conditions from Fe-bearing phases and phase assemblages fou...
Cu掺杂对Fe/Mo双钙钛矿居里温度的影响
Fe/Mo双钙钛矿 Cu掺杂
2008/4/30
研究了双钙钛矿结构化合物Sr2FeMoO6中Fe位的Cu2+离子替代效应,样品中Cu2+离子替代Fe3+离子没有引起结构变化,但导致样品B位离子有序度降低.并且随Cu2+离子的掺入,室温下样品的磁化强度迅速下降.而居里温度TC随Cu2+的掺入有所上升,因此认为Cu2+离子的掺入破坏了Fe3+-Mo5+反铁磁耦合,抑制了样品的原有铁磁性,促使Mo5+向Mo6+的转变和Fe3+向Fe2+的转变引起Fe...