Fig. 4: Polarized neutron reflectometry (PNR) characterization of ferromagnetism in (Pr0.85Y0.15)0.7Ca0.3CoO3-δ films. | Nature Communications

Fig. 4: Polarized neutron reflectometry (PNR) characterization of ferromagnetism in (Pr0.85Y0.15)0.7Ca0.3CoO3-δ films.

From: Room-temperature valence transition in a strain-tuned perovskite oxide

Fig. 4: Polarized neutron reflectometry (PNR) characterization of ferromagnetism in (Pr0.85Y0.15)0.7Ca0.3CoO3-δ films.The alternative text for this image may have been generated using AI.

(a) Neutron reflectivity (R) vs. scattering wave vector magnitude (Qz) from a 56-unit-cell-thick (Pr0.85Y0.15)0.7Ca0.3CoO3-δ film on LSAT(001) at 5 K, in a 30-kOe (3-T) in-plane magnetic field (H). Black and red points denote the non-spin-flip channels R++ and R− −, respectively, and the solid lines are the fits discussed in the text. (b) Spin asymmetry [SA = (R++-R− −)/(R+++R− −)] vs. Qz extracted from (a), along with the same for a 28-unit-cell-thick film on YAO(101). (c) Depth (z) profiles of the nuclear scattering length density (ρNuc, left-axis) and magnetization (M, right-axis) extracted from the fits to the LSAT(001) data shown in (a, b). (d) 5-K M vs. H hysteresis loop from a 56-unit-cell-thick (Pr0.85Y0.15)0.7Ca0.3CoO3-δ film on LSAT(001). Error bars on the neutron data are ±1 standard deviation.

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