Ferromagnetic quantum phase transition in Sr$_{1-x}$Ca$_x$RuO$_3$ thin films

M. Schneider; V. Moshnyaga; P. Gegenwart

doi:10.1002/pssb.200983004

paper

Ferromagnetic quantum phase transition in Sr $_{1 - x}$ Ca $_{x}$ RuO $_{3}$ thin films

arXiv:0905.4885 · doi:10.1002/pssb.200983004

Abstract

The ferromagnetic quantum phase transition in the perovskite ruthenate Sr $_{1 - x}$ Ca $_{x}$ RuO $_{3}$ is studied by low-temperature magnetization and electrical resistivity measurements on thin films. The films were grown epitaxially on SrTiO $_{3}$ substrates using metalorganic aerosol deposition and characterized by X-ray diffraction and room temperature scanning tunneling microscopy. High residual resistivity ratios of 29 and 16 for $x = 0$ and $x = 1$ , respectively, prove the high quality of the investigated samples. We observe a continuous suppression of the ferromagnetic Curie temperature from $T_{C} = 160$ K at $x = 0$ towards $T_{C} \to 0$ at $x_{c} \approx 0.8$ . The analysis of the electrical resistivity between 2 and 10 K reveals $T^{2}$ and $T^{3/2}$ behavior at $x \leq 0.6$ and $x \geq 0.7$ , respectively. For undoped CaRuO $_{3}$ , the measurement has been extended down to 60 mK, revealing a crossover to $T^{2}$ behavior around 2 K, which suggests a Fermi-liquid ground state in this system.

3 pages, 4 Figures, Manuscript for Proceedings of the International Conference on Quantum Criticality and Novel Phases (QCNP09, Dresden)

References in corpus (1)

Phase separation and suppression of critical dynamics at quantum transitions of itinerant magnets: MnSi and (Sr $_{1 - x}$ Ca $_{x}$ )RuO $_{3}$

Ferromagnetic quantum phase transition in Sr1−x​Cax​RuO3​ thin films

Abstract

References in corpus (1)

Cited by in corpus (9)

Ferromagnetic quantum phase transition in Sr $_{1 - x}$ Ca $_{x}$ RuO $_{3}$ thin films