Magnetic anisotropy and spin scattering in (La2/3Sr1/3)MnO3/CaRuO3 bilayers

Balakrishnan, Purnima P.; Lindgren, Emily; Kane, Margaret; Wisser, Jacob J.; Suzuki, Yuri

doi:10.1063/9.0000188

Title: Magnetic anisotropy and spin scattering in (La_2/3Sr_1/3)MnO₃/CaRuO₃ bilayers

Journal Article · Wed Feb 03 00:00:00 EST 2021 · AIP Advances

DOI:https://doi.org/10.1063/9.0000188· OSTI ID:1851086

^[1]; Lindgren, Emily ^[1];

^[1];

^[1]; Suzuki, Yuri ^[1]

Stanford Univ., CA (United States)

Complex ferromagnetic oxides have been identified as possible candidate materials for sources of spin currents. Here we study bilayers of ferromagnetic (La_2/3Sr_1/3)MnO₃ (LSMO) and metallic CaRuO₃ (CRO) on LSAT substrates as a model system for spin pumping. Ferromagnetic resonance (FMR) measurements of these bilayers show evidence of spin pumping across the interface in the form of an increase in Gilbert damping with the addition of CRO. FMR indicates that the presence of CRO modifies the magnetic anisotropy of the LSMO. By increasing CRO thickness, we find a reduction of the out-of-plane anisotropy and simultaneous rotation of the easy axis within the plane, from the $$\langle$$110$$\rangle$$ to $$\langle$$100$$\rangle$$ axis. The evolution of magnetic anisotropy determined by FMR disagrees with that measured by bulk SQUID magnetometry and is accompanied by structural distortions in the LSMO layer as measured by x-ray diffraction, thus suggesting a change in magnetic anisotropy attributed to structural distortions imposed on LSMO by CRO. These results suggest that while LSMO and CRO remain promising candidates for efficient pure spin current generation and detection, respectively, epitaxial integration of perovskites will cause additional changes which must be accounted for in spintronics applications.

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Research Organization:: Stanford Univ., CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; US Department of the Navy, Office of Naval Research (ONR); National Science Foundation (NSF): Vannevar Bush Faculty Fellowship; USDOE

Grant/Contract Number:: SC0008505; N00014-15-1-0045; 1762971; ECCS-1542152; DESC0008505

OSTI ID:: 1851086

Alternate ID(s):: OSTI ID: 1970630

Journal Information:: AIP Advances, Vol. 11, Issue 2; ISSN 2158-3226

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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