The composition-spread epitaxial thin film of Sr1-xCa xRuO3 (0.13 ≤ x ≤ 0.53) was synthesized by the pulsed laser deposition technique and its x-dependent magnetic properties were probed by the magneto-optical (MO) Kerr spectroscopy. The MO spectra in the energy region of the charge-transfer excitation (O 2p to Ru 4d) are observed to change their spectral intensity critically depending on temperature (T) and x while preserving the spectral shape. The contour mapping of the MO intensity in the x-T plane clarifies the continuous ferromagnetic-to-paramagnetic phase change with increase of not only T but also x, revealing the quantum-critical point around x = 0.5.
ASJC Scopus subject areas
- Physics and Astronomy(all)