Strain-induced magnetic phase transition in SrCoO${}_{3-\delta }$ thin films

Abstract

It has been well established that both in bulk at ambient pressure and for films under modest strains, cubic SrCoO${}_{3-\delta }$ ($\delta <0.2$) is a ferromagnetic metal. Recent theoretical work, however, indicates that a magnetic phase transition to an antiferromagnetic structure could occur under large strain accompanied by a metal-insulator transition. We have observed a strain-induced ferromagnetic to antiferromagnetic phase transition in SrCoO${}_{3-\delta }$ films grown on DyScO${}_3$ substrates, which provide a large tensile epitaxial strain, as compared to ferromagnetic films under lower tensile strain on SrTiO${}_3$ substrates. Magnetometry results demonstrate the existence of antiferromagnetic spin correlations and neutron diffraction experiments provide a direct evidence for a G-type antiferromagnetic structure with Neél temperatures between $T_N\sim 135\pm 10K$ and $\sim 325\pm 10K$ depending on the oxygen content of the samples. Therefore, our data experimentally confirm the predicted strain-induced magnetic phase transition to an antiferromagnetic state for SrCoO${}_{3-\delta }$ thin films under large epitaxial strain.

arXiv comment6 pages, 4 figures

References in corpus (10)

• The spin state transition in LaCoO${}_3$; revising a revision
• Reversible redox reactions in an epitaxially stabilized SrCoOx oxygen sponge
• Topotactic phase transformation of the brownmillerite SrCoO2.5 to the perovskite SrCoO3-δ
• Magnetism, Charge Order and Giant Magnetoresistance in SrFeO${}_{3-\delta }$ Single Crystals
• Orienting oxygen vacancies for fast catalytic reaction
• Neutron diffraction study of spin and charge ordering in SrFeO(3-delta)
• Coupled magnetic-ferroelectric metal-insulator transitions in epitaxially-strained SrCoO${}_3$ from first principles
• Reversal of the lattice structure in SrCoOx epitaxial thin films studied by real-time optical spectroscopy and first-principles calculations
• Large spin-phonon coupling and magnetically-induced phonon anisotropy in Sr$M$O${}_3$ perovskites ($M$=V,Cr,Mn,Fe,Co)
• Suppression of Magnetic Phase Separation in Epitaxial SrCoOx Films

Cited by in corpus (10)

• Frustrated Magnetism and Caloric Effects in Mn-antiperovskite Nitrides: $AbInitio$ Theory
• Strain engineering of epitaxial oxide heterostructures beyond substrate limitations
• Role of oxygen vacancy in the spin-state change and magnetic ordering in SrCoO${}_{3-\delta }$
• Unconventional exchange bias coupling at perovskite/brownmillerite interface in spontaneously stabilized SrCoO3-δ/SrCoO2.5 bi-layer
• Structural, transport, optical and electronic properties of Sr${}_2$CoNbO${}_6$ thin films
• Giant photoinduced lattice distortion in oxygen-vacancy ordered SrCoO2.5 thin films
• Revisiting the zero-temperature phase diagram of stoichiometric SrCoO3 with first-principles methods
• Tuning magnetic exchange interactions in 2D magnets: the case of CrGeX${}_3$ (X = Se, Te) and Janus Cr${}_2$Ge${}_2$(Se,Te)${}_3$ monolayers
• Topological Descendants of Multicritical EuTl2
• Ferromagnetic polar metals via epitaxial strain: a case study of SrCoO${}_3$