Tuning electromagnetic properties of SrRuO3 epitaxial thin films via atomic control of cation vacancies

Abstract

Elemental defect in transition metal oxides is an important and intriguing subject that result in modifications in variety of physical properties including atomic and electronic structure, optical and magnetic properties. Understanding the formation of elemental vacancies and their influence on different physical properties is essential in studying the complex oxide thin films. In this study, we investigated the physical properties of epitaxial SrRuO3 thin films by systematically manipulating cation and/or oxygen vacancies, via changing the oxygen partial pressure (P(O2)) during the pulsed laser epitaxy (PLE) growth. Ru vacancies in the low-P(O2)-grown SrRuO3 thin films induce lattice expansion with the suppression of the ferromagnetic T C down to ~120 K. Sr vacancies also disturb the ferromagnetic ordering, even though Sr is not a magnetic element. Our results indicate that both A and B cation vacancies in an ABO3 perovskite can be systematically engineered via PLE, and the structural, electrical, and magnetic properties can be tailored accordingly.

Symmetry-Driven Spin-Wave Gap Modulation in Nanolayered SrRuO3/SrTiO3 Heterostructures: Implications for Spintronic Applications

“…S1). 33 shows the y-dependent ao/bo for the [(SRO)6|(STO)y]10 SLs with the y-dependent structural phase transition from the orthorhombic to the tetragonal symmetry. Based on ao/bo, θtilt was estimated as θtilt = cos -1 (bo/ao), assuming that the Ru-O-Ru bond length change is negligible.…”

“…FigureS3(b) shows the temperature derivative of the resistivity (dρxx (T) / dT) for the SRO SLs. In particular, α is a representative parameter for describing the electrical transport characteristics of SRO for three different temperature regimes (see Inset of FigureS2(b)) 32,33. Above Tc, the extracted α (0.5) indicates the bad metallic behavior of SRO.…”

Investigations of structural, electronic and optical properties of TM-GaO3 (TM = Sc, Ti, Ag) perovskite oxides for optoelectronic applications: a first principles study

“…They unveiled that it is a suitable material for the applications in renewable energy and spin based devices. The electromagnetic [14], structural, magnetic and optical properties have extensively been discussed in SrRuO 3, XAlO 3 (X=Cs, Rb, K) [15]. Theoretical investigation on SrRhO 3 had revealed its ductile and metallic nature while SrZrO 3 has been reported as insulator and brittle in nature [16].…”

Ex-situ atomic force microscopy on the growth mode of SrRuO 3 epitaxial thin film

“…The temperature dependent resistivity R(T) and magnetization M(T) results clearly show the ferromagnetic transition temperature at ~150 K, suggesting that we have a stoichiometric SRO epitaxial thin film on a STO substrate, in good agreement with other previous studies. [3,29] From the total thickness of the thin film obtained from XRR and the number of laser shots fired, we estimated ~65.4 shots for the growth of 1 u.c. layer of SRO thin film.…”