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首页> 外文会议>Symposium on Multicomponent Oxide Films for Electronics held April 6-8,1999,San francisco,California,U.S.A. >Low magnetic field response of 2D-array of weakly coupled ferromagnets
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Low magnetic field response of 2D-array of weakly coupled ferromagnets

机译：弱耦合铁磁体的二维阵列的低磁场响应

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摘要

We demonstrated a low mangetic field response in 2D array of weakly coupled ferromagnets created by bi-epitaxial growth of La-0.7Sr_0.3MnO_3 film on multilayer template of MgO seed and CeO_2 buffer layer deposited on SrTiO_3 substrate. To form the array we etched the MgO seed layer into a chess board pattern. The chess board fields, where the substrate surface is disclosed, initiate a 45 deg in plate rotated growth of the CeO-2 buffer layer while it does not rotate on the neighboring fields covered by MgO seed layer. The La_0.7Sr_0.3MnO_3 film inherits the template orientation of the buffer layer forming misoriented at 45 deg domains and a well defined 2D array of 45 deg grain boundaries is created. The size of the domains, correspondingly the number of grain boundaries, can be varied by changing the dimensions of the chess fields. The multilayer structures were investigated by theta -2 theta and phi -scan x-ray diffraction. A magnetoresistance of 25
机译：我们证明了由La-0.7Sr_0.3MnO_3薄膜在MgO种子多层模板和沉积在SrTiO_3衬底上的CeO_2缓冲层的双外延生长产生的弱耦合铁磁体的二维阵列中的低场磁场响应。为了形成阵列，我们将MgO种子层蚀刻成棋盘图案。棋盘区域，其中公开了衬底表面，在CeO-2缓冲层的板旋转中开始生长45度，而CeO-2缓冲层在由MgO种子层覆盖的相邻区域中不旋转。 La_0.7Sr_0.3MnO_3薄膜继承了缓冲层的模板方向，从而在45度畴上形成了误取向，并创建了清晰定义的45度晶界二维阵列。可以通过改变象棋场的尺寸来改变畴的尺寸，相应地改变晶界的数量。通过θ-2θ和φ-扫描x射线衍射研究了多层结构。磁阻为25

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