Temperature dependent dynamic and static magnetic response in magnetic tunnel junctions with Permalloy layersстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 22 декабря 2015 г.
Аннотация:Ferromagnetic resonance and static magnetic properties of CoFe∕Al2O3∕CoFe∕Py and CoFe∕Al2O3∕CoFeB∕Pymagnetic tunnel junctions and of 25nm thick single-layer Permalloy (Py) films have been studied as a function of temperature down to 2K. The temperature dependence of the ferromagnetic resonance excited in the Py layers in magnetic tunnel junctions shows “kneelike” enhancement of the resonance frequency accompanied by an anomaly in the magnetization near 60K. We attribute the anomalous static and dynamic magnetic response at low temperatures to interface stress induced magnetic reorientation transition at the Py interface which could be influenced by dipolar soft-hard layer coupling through the Al2O3 barrier.