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Magnetic phase transitions in Ta/CoFeB/MgO multilayers

Authors :: Christopher Safranski
Ilya Krivorotov
Jordan A. Katine
Brian Youngblood
A. M. Gonçalves
Michael Farle
Yu Fu
Y.-J. Chen
Igor Barsukov
Marina Spasova
C. C. Kuo
SPINtronique et TEchnologie des Composants (SPINTEC)
Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG)
Direction de Recherche Fondamentale (CEA) (DRF (CEA))
Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA))
Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)
HGST San Jose Research Center
Source :: Applied Physics Letters, Applied Physics Letters, American Institute of Physics, 2015, 106 (19), pp.192407. ⟨10.1063/1.4921306⟩, Applied Physics Letters, 2015, 106 (19), pp.192407. ⟨10.1063/1.4921306⟩
Publication Year :: 2015
Publisher :: arXiv, 2015.
Abstract: International audience; We study thin films and magnetic tunnel junction nanopillars based on Ta/Co20Fe60B20/MgO multilayers by electrical transport and magnetometry measurements. These measurements suggest that an ultrathin magnetic oxide layer forms at the Co20Fe60B20/MgO interface. At approximately 160 K, the oxide undergoes a phase transition from an insulating antiferromagnet at low temperatures to a conductive weak ferromagnet at high temperatures. This interfacial magnetic oxide is expected to have significant impact on the magnetic properties of CoFeB-based multilayers used in spin torque memories. (C) 2015 AIP Publishing LLC.

Details

ISSN :: 00036951
Database :: OpenAIRE
Journal :: Applied Physics Letters, Applied Physics Letters, American Institute of Physics, 2015, 106 (19), pp.192407. ⟨10.1063/1.4921306⟩, Applied Physics Letters, 2015, 106 (19), pp.192407. ⟨10.1063/1.4921306⟩
Accession number :: edsair.doi.dedup.....7e1117f8c82bcd8de5d04e04a711a527
Full Text :: https://doi.org/10.48550/arxiv.1504.06716