Effect of crystalline quality and substitution on magnetic anisotropy of SrRuO3 thin films

Koleśnik, S.; Yoo, Yong Keun; Chmaissem, O.; Dąbrowski, B.; Maxwell, Timothy; Kimball, C. W.; Genis, A. P.

doi:10.1063/1.2165132

Cited by 29 publications

(24 citation statements)

References 15 publications

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“…Comparing the shapes of the Hall resistivity curves, it is clear that the magnetocrystalline anisotropy is different for tetragonal and orthorhombic SRO. Whereas square loops were seen for the orthorhombic film indicating a magnetic easy axis direction close to the substrate normal 17, the loop shape measured for the tetragonal film was characteristic for an out‐of‐plane magnetic hard axis. An applied field of 8 T was not sufficient to saturate the magnetization in the out‐of‐plane direction such that the high field slope was still dominated by the positive anomalous Hall constant.…”

Section: Resultsmentioning

confidence: 99%

Hall effect of tetragonal and orthorhombic SrRuO₃ films

Bern

Ziese

Dörr

et al. 2012

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IntroductionIn recent years the anomalous Hall effect in ferromagnets was extensively investigated, see [1] for a review. These studies were motivated by the fact that the anomalous Hall effect contains an intrinsic contribution [2] that is directly linked to the Berry phase acquired by Bloch electrons moving through ferromagnetic spin textures. SrRuO 3 has often served as a model system, since experimentally the anomalous Hall effect shows an intricate dependence on the temperature [3][4][5] that is inconsistent with a simple scaling of the Hall effect with the resistivity as predicted for extrinsic, i.e. scattering related contributions to the anomalous Hall effect [6,7]. Fang et al. related the anomalous Hall effect in SrRuO 3 to specific features in the Berry-phase curvature in k-space [8]. This led to an ongoing debate on the importance of intrinsic and extrinsic contributions to the anomalous Hall effect in this material [4,[9][10][11].First-principles calculations of the anomalous Hall conductivity within the Berry-phase model showed a sensitive dependence on the crystalline symmetry [8,9]. This has been explored in Pr 0.7 Ca 0.3 MnO 3 /SrRuO 3 superlattices with either orthorhombic or tetragonal SrRuO 3 layers [12]. However, since the anomalous Hall effect in the superlattices might be affected by the magnetic coupling of

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Section: Resultsmentioning

confidence: 99%

Hall effect of tetragonal and orthorhombic SrRuO₃ films

Bern

Ziese

Dörr

et al. 2012

Physica Rapid Research Ltrs

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“…This issue has not yet been settled with probably both effects contributing to the size of the magnetic moment. 3 films grown on SrTiO 3 (001) have a somewhat intricate magnetocrystalline anisotropy [37,38]. The in-plane [001] axis is magnetically hard; a second magnetic hard axis is found in the (001) plane directed under about 30° with respect to the in-plane [1 10] axis; an easy axis is located in the (001) plane tilted away from the [110] axis under about 30° towards the [110] axis.…”

Section: Review @ Rrlmentioning

confidence: 94%

Properties of manganite/ruthenate superlattices with ultrathin layers

Ziese

Vrejoiu

2013

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The properties of manganite/ruthenate superlattices are reviewed with a specific focus on the manganite/ruthenate interface. La0.7Sr0.3MnO3/SrRuO3 and Pr0.7Ca0.3MnO3/SrRuO3 superlattices grow with a high crystalline perfection as illustrated in the figure to the right: at the interface the individual cation species can be clearly identified, interdiffusion is marginal. The superlattices show magnetization processes with an intricate interplay between magnetocrystalline anisotropy, size of the layer magnetization, spin confinement and interfacial antiferromagnetic interlayer coupling. There is further an unprecedented Curie temperature stabilization at room temperature values of the La0.7Sr0.3MnO3 layers in the superlattices down to layer thicknesses of one unit cell. The magnetotransport properties, especially the Hall effect, indicate the existence of a quasi‐two‐dimensional hole gas at the La0.7Sr0.3MnO3/SrRuO3 interface; this is further supported by an analysis of cation displacements as determined from scanning transmission electron microscopy. The manganite/ruthenate interface might be considered as a model system for the study of interfacial reconstruction and charge transfer in a highly correlated ferromagnetic system.magnified imageHAADF‐STEM micrograph of two La0.7Sr0.3MnO3/SrRuO3 interfaces in a superlattice with four unit cell thick La0.7Sr0.3MnO3 and eight unit cell thick SrRuO3 layers. The spheres indicate the cations as determined from the Z‐contrast.(© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…9 Moreover, paramagnetic contributions of SRO in high magnetic fields have been discussed. 24 In thin films, it is difficult to separate the substrate contribution (which is commonly assumed to be diamagnetic, possibly giving rise to another error) to the measured magnetic moment for the case of a nonsaturated film magnetization. Our measured values lie in the range published in literature before, which is rather wide.…”

Section: B Magnetismmentioning

confidence: 99%

Magnetism of the tensile-strain-induced tetragonal state of SrRuO3films

et al. 2013

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SrRuO 3 films have been grown in the tetragonal, structurally single-domain state under 1% of biaxial tensile strain. The angular dependencies of the magnetization and the magnetoresistance reveal an upright orientation of the tetragonal unit cell and biaxial magnetic in-plane anisotropy with 110 t easy axes. Reversible biaxial strain from piezoelectric Pb(Mg 1/3 Nb 2/3 ) 0.72 Ti 0.28 O 3 (PMN-PT) substrates has been applied to probe the direct strain response of the magnetization and the electrical resistance. At 1% tensile strain, the Curie temperature (T C ) and the ordered magnetic moment (m S ) at low temperatures are found to substantially decrease with further growing tensile strain. This suggests a suppression of m S resulting from distortions of the RuO 6 octahedra, in line with reported density-functional calculations. Reversible strain has also been applied to a film under weak tensile strain revealing the opposite response, i.e., an enhancement of T C and m S with tensile strain. Structural and magnetic properties of SrRuO 3 films in several static strain states (compressive, weak and strong tensile strain) are compared.

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Effect of crystalline quality and substitution on magnetic anisotropy of SrRuO3 thin films

Cited by 29 publications

References 15 publications

Hall effect of tetragonal and orthorhombic SrRuO₃ films

Hall effect of tetragonal and orthorhombic SrRuO₃ films

Properties of manganite/ruthenate superlattices with ultrathin layers

Magnetism of the tensile-strain-induced tetragonal state of SrRuO3films

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Effect of crystalline quality and substitution on magnetic anisotropy of SrRuO3 thin films

Cited by 29 publications

References 15 publications

Hall effect of tetragonal and orthorhombic SrRuO3 films

Hall effect of tetragonal and orthorhombic SrRuO3 films

Properties of manganite/ruthenate superlattices with ultrathin layers

Magnetism of the tensile-strain-induced tetragonal state of SrRuO3films

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Hall effect of tetragonal and orthorhombic SrRuO₃ films

Hall effect of tetragonal and orthorhombic SrRuO₃ films