Ferromagnetism with Strong Perpendicular Magnetic Anisotropy in Epitaxial 
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 Perovskit

Hou, Pengxiang; Liu, Yiren; Liu, Zhiyu; Zhu, Chuanhui; Li, Yao; Xi, Zhongnan; Han, Ya-jie; Li, Jiayi; Li, Man-Rong; Zhou, Jian; Chen, Lan; Yang, Yurong; Liu, Junming; Wu, Di

doi:10.1103/physrevapplied.18.054083

Cited by 3 publications

(6 citation statements)

References 58 publications

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“…For the SMIO30 film, the maximum magnetization appears at θ = 90 • and 270 • , along the out-of-plane direction and the magnetization varies with θ following a sinusoidal-like function. This indicates that the easy axis in the SMIO30 film is indeed in the out-of-plane direction, as previously reported [27]. However, for the SMIO40 film with weaker PMA, as shown in the supplemental material figure S4(c), the magnetization reaches its maximum at θ = 50 • , 130 • , 230 • and 310 • .…”

Section: Magnetic Characterizationssupporting

confidence: 83%

“…The Ir valence in the SMIO films also increases with increasing x. As revealed previously in SMIO30 films through firstprinciples calculations [27], although Mn and Ir moments are aligned antiparallel, Mn cations contribute most of the magnetic moments with spins aligned parallel. Ir moments are small and mostly composed of orbital moments [33].…”

Section: Magnetic Characterizationssupporting

confidence: 75%

“…Figures 1(b) and (c) show typical cross-sectional HAADF-STEM images of the SMIO30 and SMIO40 films, respectively, recorded along the [1 10] zone axis. Since the contrast of a HAADF-STEM image is proportional to atomic number of the columns by Z 2 [31], the uniform intensity of the perovskite B sites, shown in the bottom panel of figures 1(b) and (c), indicates that Mn and Ir cations are distributed randomly in the SMIO films, as we have reported previously in SMIO30 films observed along the [100] zone axis [27]. Typical surface AFM images of the SMIO films are shown in figure S1 of supplemental material, demonstrating a clear stepand-terrace morphology.…”

Section: Structure Characterizationssupporting

confidence: 60%

“…The difference in the in-plane and out-of-plane M-H loops of the SMIO films indicates a PMA. The PMA in the SMIO30 film has been reported to be associated with lattice distortion and oxygen octahedron rotation [27]. It is clear from figure 2 that the PMA of SMIO films decreases with increasing Mn concentration x.…”

Section: Magnetic Characterizationsmentioning

confidence: 91%

“…The last term gives the Zeeman energy. Magnetic parameters and anisotropy and magnetic field directions are determined by experiments and first-principles calculations [27]. The magnetic moment of Ir is set by 0.08 µ B , and the magnetic moment of Mn is five times larger than that of Ir.…”

Section: Experimental Methodsmentioning

confidence: 99%

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Magnetic anisotropy and planar topological Hall effect in SrMn_xIr₁₋ _x O₃ films

Hou

Liu

et al. 2023

J. Phys.: Condens. Matter

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Strong Coulomb repulsion and spin-orbit coupling are known to give rise to exotic physical phenomena in transition metal oxides. Here, we report magnetic and transport characteristics of (001) oriented epitaxial SrMnxIr1-xO3 thin films, having both 3d and 5d elements on the perovskite B sites. With the increase of Mn concentration, perpendicular magnetic anisotropy decreases gradually in accompany with the magnetic easy axis tilting away from the out-of-plane [001] direction. X-ray absorption spectroscopy reveals that Mn eg electrons preferentially occupy the "d" _(〖"3z" 〗^"2" "-" "r" ^"2" ) orbital, which produces the observed perpendicular magnetic anisotropy in the framework of spin-orbital coupling. A planar topological Hall effect appears in SrMnxIr1-xO3 films with x about 0.30 when the magnetic field is applied along the current, which is a result of the noncoplanar spin structure due to the competition among the perpendicular magnetic anisotropy, the magnetic exchange interaction and the Zeeman energy. These results provide an example to show the subtle balance among complex competitions in materials with both strong correlation and spin-orbit coupling.

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Section: Magnetic Characterizationssupporting

confidence: 83%

Section: Magnetic Characterizationssupporting

confidence: 75%

Section: Structure Characterizationssupporting

confidence: 60%

Section: Magnetic Characterizationsmentioning

confidence: 91%

Section: Experimental Methodsmentioning

confidence: 99%

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Magnetic anisotropy and planar topological Hall effect in SrMn_xIr₁₋ _x O₃ films

Hou

Liu

et al. 2023

J. Phys.: Condens. Matter

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Peculiar thickness dependence of perpendicular magnetic anisotropy in epitaxial NiCo2O4 spinel films

Wang

et al. 2023

Applied Physics Letters

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We reported a peculiar thickness dependence of perpendicular magnetic anisotropy (PMA), stronger in thinner films, in spinel NiCo2O4 (NCO) films deposited epitaxially on MgAl2O4 (001) single crystalline substrates. The effective PMA field is about 3 T in 23.0 nm-thick films but increases dramatically to about 7 T in 4.5 nm-thick films. X-ray absorption spectra reveal an inhomogeneous distribution of Co2+ cations along the film's normal with more Co2+ adjacent to the film/substrate interface. X-ray linear dichroism spectra reveal that the PMA in NCO films is associated with electrons occupying the x2–y2 orbital of Co cations at the tetrahedral sites. This work demonstrates the potential of ultrathin NCO films in all-oxide spintronic devices.

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Structure and magnetic properties of epitaxial Sr-LaMnO3 thin films obtained by polymer assisted deposition

Vukmirović,

Piper,

Šenjug

et al. 2024

Preprint

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Epitaxial La1 − xSrxMnO3 (LSMO, where x = 0, 0.1, 0.3 and 0.5) films on single crystal SrTiO3 (001) substrate were obtained by water-based chemical solution deposition method, so-called polymer assisted deposition. The as-prepared films (heated at 750°C for 1 h) have thickness of ~ 30 nm, high uniformity, clear and well-defined interface and crack free surfaces. In addition, they are characterized by the formation of an imperfect crystal structure with some disoriented areas, small amount of non-stoichiometric phase and defects created just to support the epitaxial film growth. During multiple annealing at different temperatures up to 900°C epitaxial nature was preserved in all LSMO films and the structure rearrangement through elimination of defects and formation of unit cell closer to the corresponding bulk stoichiometric phase was observed. The magnetic properties of the LSMO thin film were measured using SQUID magnetometer in the temperature range of 5–400 K with the field applied parallel (in-plane) and perpendicular (out-of-plane) to the film surface. The angle dependence of the magnetic moment in the LSMO thin films at the room temperature was also measured by a vibrating sample magnetometer.

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Ferromagnetism with Strong Perpendicular Magnetic Anisotropy in Epitaxial SrMn0.3Ir0.7O3 Perovskit

Cited by 3 publications

References 58 publications

Magnetic anisotropy and planar topological Hall effect in SrMn_xIr₁₋ _x O₃ films

Magnetic anisotropy and planar topological Hall effect in SrMn_xIr₁₋ _x O₃ films

Peculiar thickness dependence of perpendicular magnetic anisotropy in epitaxial NiCo2O4 spinel films

Structure and magnetic properties of epitaxial Sr-LaMnO3 thin films obtained by polymer assisted deposition

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Ferromagnetism with Strong Perpendicular Magnetic Anisotropy in Epitaxial SrMn0.3Ir0.7O3 Perovskit

Cited by 3 publications

References 58 publications

Magnetic anisotropy and planar topological Hall effect in SrMn x Ir1− x O3 films

Magnetic anisotropy and planar topological Hall effect in SrMn x Ir1− x O3 films

Peculiar thickness dependence of perpendicular magnetic anisotropy in epitaxial NiCo2O4 spinel films

Structure and magnetic properties of epitaxial Sr-LaMnO3 thin films obtained by polymer assisted deposition

Contact Info

Product

Resources

About

Magnetic anisotropy and planar topological Hall effect in SrMn_xIr₁₋ _x O₃ films

Magnetic anisotropy and planar topological Hall effect in SrMn_xIr₁₋ _x O₃ films