Perpendicular magnetic anisotropy in compressive strained La0.67Sr0.33MnO3 films
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Perpendicular magnetic anisotropy (PMA) plays a critical role in spintronics, giving rise to improvements in fundamental research and industrial production. Generally, PMA originates mainly from the spin–orbit interaction with perpendicular orbital moment. However, electron orbitals are difficult to tune once they emerge. Here, we propose a simple and effective method for preparing (001)-oriented ultrathin La0.67Sr0.33MnO3 (LSMO) films with PMA, which is induced by compressive strain and surface symmetry breaking. Moreover, PMA was effectively strengthened by means of annealing under applied magnetic field. X-ray linear dichroism spectra reveal that PMA should be attributed to the preferential occupancy of the 3z2 − r2 orbital in LSMO films. The results presented here show that PMA can be manipulated by orbital reconstruction in perovskite manganite films under compressive strain through a simple and effective strategy. These findings illustrate a new method for designing and controlling magnetic anisotropy and might advance fundamental applications of orbital physics and spintronics.
The work was financially supported by the NSFC (Nos. 51571136, 61434002, and 51871137). The authors acknowledge the Beamline BL08U1A (Shanghai Synchrotron Radiation Facility, Shanghai, China) and Beamline BL12-a (National Synchrotron Radiation Laboratory, Hefei, China) stations for XAS measurements.
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Conflict of interest
The authors declare that they have no conflict of interest.
- 5.Yakovenko OS, Matzui LYu, Vovchenko LL, Trukhanov AV, Kazakevich IS, Trukhanov SV, Prylutskyy YI, Ritter U (2017) Magnetic anisotropy of the graphite nanoplatelet–epoxy and MWCNT–epoxy composites with aligned barium ferrite filler. J Mater Sci 52:5345–5358. https://doi.org/10.1007/s10853-017-0776-4 CrossRefGoogle Scholar
- 9.Boulle O, Vogel J, Yang H, Pizzini S, de Souza Chaves D, Locatelli A, Menteş TO, Sala A, Buda-Prejbeanu LD, Klein O, Belmeguenai M, Roussigné Y, Stashkevich A, Chérif SM, Aballe L, Foerster M, Chshiev M, Auffret S, Miron IM, Gaudin G (2016) Room-temperature chiral magnetic skyrmions in ultrathin magnetic nanostructures. Nat Nanotechnol 11:449–454CrossRefGoogle Scholar
- 10.Li P, Liu T, Chang H, Kalitsov A, Zhang W, Csaba G, Li W, Richardson D, DeMann A, Rimal G, Dey H, Jiang JS, Porod W, Field SB, Tang J, Marconi MC, Hoffmann A, Mryasov O, Wu M (2016) Spin–orbit torque-assisted switching in magnetic insulator thin films with perpendicular magnetic anisotropy. Nat Commun 7:12688CrossRefGoogle Scholar
- 12.Shao Q, Tang C, Yu G, Navabi A, Wu H, He C, Li J, Upadhyaya P, Zhang P, Razavi SA, He QL, Liu Y, Yang P, Kim SK, Zheng C, Liu Y, Pan L, Lake RK, Han X, Tserkovnyak Y, Shi J, Wang KL (2018) Role of dimensional crossover on spin–orbit torque efficiency in magnetic insulator thin films. Nat Commun 9:3612CrossRefGoogle Scholar
- 34.Liao Z, Huijben M, Zhong Z, Gauquelin N, Macke S, Green RJ, Van Aert S, Verbeeck J, Van Tendeloo G, Held K, Sawatzky GA, Koster G, Rijnders G (2016) Controlled lateral anisotropy in correlated manganite heterostructures by interface-engineered oxygen octahedral coupling. Nat Mater 15:425–431CrossRefGoogle Scholar