Integration of antiferromagnetic Heusler compound Ru2MnGe into spintronic devices

Jan Balluff, Teodor Huminiuc, Markus Meinert, Atsufumi Hirohata, Guenter Reiss

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We report on the integration of an antiferromagnetic Heusler compound acting as a pinning layer into magnetic tunneling junctions (MTJs). The antiferromagnet Ru2MnGe is used to pin the magnetization direction of a ferromagnetic Fe layer in MgO based thin film tunneling magnetoresistance stacks. The samples were prepared using magnetron co-sputtering. We investigate the structural properties by X-ray diffraction and reflection, as well as atomic force and high-resolution transmission electron microscopy. We find an excellent crystal growth quality with a low interface roughnesses of 1–3 A ̊ , which is crucial for the preparation of working tunneling barriers. Using Fe as a ferromagnetic elec- trode material, we prepared magnetic tunneling junctions and measured the magnetoresistance. We find a sizeable maximum magnetoresistance value of 135%, which is comparable to other common Fe based MTJ systems.
Original languageEnglish
Article number032406
Pages (from-to)1-5
Number of pages5
JournalApplied Physics Letters
Publication statusPublished - 18 Jul 2017

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  • Heusler alloys
  • antiferromagnetic materials

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