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          Institute: MPI für Chemische Physik fester Stoffe     Collection: publications 2013     Display Documents

ID: 671332.0, MPI für Chemische Physik fester Stoffe / publications 2013
X-ray absorption spectroscopy and magnetic circular dichroism studies of L10-Mn-Ga thin films
Authors:Glas, M.; Sterwerf, C.; Schmalhorst, J. M.; Ebke, D.; Jenkins, C.; Arenholz, E.; Reiss, G.
Date of Publication (YYYY-MM-DD):2013-11-14
Title of Journal:Journal of Applied Physics
Issue / Number:18
Start Page:183910-1
End Page:183910-5
Sequence Number of Article:183910
Review Status:not specified
Audience:Not Specified
Abstract / Description:Tetragonally distorted Mn3-xGax thin films with 0.1 < x < 2 show a strong perpendicular magnetic anisotropy and low magnetization and thus have the potential to serve as electrodes in spin transfer torque magnetic random access memory. Because a direct capping of these films with MgO is problematic due to oxide formation, we examined the influence of a CoFeB interlayer and of two different deposition methods for the MgO barrier on the formation of interfacial Mn-O for Mn62Ga38 by element specific X-ray absorption spectroscopy (XAS) and magnetic circular dichroism (XMCD). A highly textured L1(0) crystal structure of the Mn-Ga films was verified by X-ray diffraction measurements. For samples with e-beam evaporated MgO barrier no evidence for Mn-O was found whereas in samples with magnetron sputtered MgO, Mn-O was detected, even for the thickest interlayer thickness. Both XAS and XMCD measurements showed an increasing interfacial Mn-O amount with decreasing CoFeB interlayer thickness. Additional element specific full hysteresis loops determined an out-of-plane magnetization axis for the Mn and Co, respectively. (C) 2013 AIP Publishing LLC.
External Publication Status:published
Document Type:Article
Communicated by:Ina Werner
Affiliations:MPI für chemische Physik fester Stoffe
Identifiers:ISI:000327261800057 [ID No:1]
ISSN:0021-8979 [ID No:2]
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