Effects of MgO Thickness and Roughness on Perpendicular Magnetic Anisotropy in MgO/CoFeB/Ta Multilayers-中国期刊网

摘要 Thedependenceofperpendicularmagneticanisotropy(PMA)onthebarrierlayerMgOthicknessinMgO/CoFeB/Tamultilayersisinvestigated.TheresultsshowthatthestrongestPMAoccursinasmallwindowofabout2-4nmwiththeincreaseofMgOthicknessfroml-10nm.ThecrystallinedegreeofMgOandthechangeofinteratomicdistancealongtheout-of-planedirectionmaybethemainreasonsforthechangeofPMAinthesemultilayers.Moreover,theroughnessesof2-and4-nm-thickMgOsamplesare3.163and1.8nm,respectively,andboththesamplesshowPMA.TheseresultscouldbeusedtotunethemagneticcharacteristicoftheultrathinCoFeBfilmforfutureapplicationsinperpendicularmagneticdevices.

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Effects of MgO Thickness and Roughness on Perpendicular Magnetic Anisotropy in MgO/CoFeB/Ta Multilayers

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Effects of MgO Thickness and Roughness on Perpendicular Magnetic Anisotropy in MgO/CoFeB/Ta Multilayers

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