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We have investigated the electronic properties of epitaxial orthorhombic SrIrO3 thin-films under compressive strain. The metastable, orthorhombic SrIrO3 thin-films are synthesized on various substrates using an epi-stabilization technique.…

Strongly Correlated Electrons · Physics 2014-11-18 J. H. Gruenewald , J. Nichols , J. Terzic , G. Cao , J. W. Brill , S. S. A. Seo

With local density approximation + Hubbard $U$ (LDA+$U$) calculations, we show that the ferromagnetic (FM) insulating state observed in tensile-strained LaCoO$_3$ epitaxial thin films is most likely a mixture of low-spin (LS) and high-spin…

Strongly Correlated Electrons · Physics 2022-05-20 Han Hsu , Peter Blaha , Renata M. Wentzcovitch

The crystal structure determines many of the physical properties of oxide perovskites (ABO$_3$) and only a tiny modification of the lattice structure causes major changes in the functional properties through the interplay among spin,…

We report on the observation of a strain-induced insulator state in ferromagnetic La_0.7Sr_0.3CoO_3 films. Tensile strain above 1% is found to enhance the resistivity by several orders of magnitude. Reversible strain of 0.15% applied using…

Strongly Correlated Electrons · Physics 2009-11-13 A. D. Rata , A. Herklotz , K. Nenkov , L. Schultz , K. Doerr

Crystal and domain structures of tensile-strained BiFeO3 films grown on orthorhombic (110)o PrScO3 substrates were investigated. All films possess a MB-type monoclinic structure with 109o stripe domains oriented along the [\=i10]o…

Materials Science · Physics 2013-09-04 Zuhuang Chen , Yajun Qi , Lu You , Ping Yang , C. W. Huang , Junling Wang , Thirumany Sritharan , Lang Chen

High-quality YTiO3 thin films were grown on LaAlO3 (110) substrates at low oxygen pressures (<10-8 Torr) using pulsed laser deposition. The in-plane asymmetric atomic arrangements at the substrate surface allowed us to grow epitaxial YTiO3…

Materials Science · Physics 2009-11-11 S. C. Chae , Y. J. Chang , S. S. A. Seo , T. W. Noh , D. -W. Kim , C. U. Jung

Layered perovskite La2CuO4+delta(LCO) thin films were epitaxially grown on SrTiO3 (STO) and LaSrAlO4 (LSAO) substrates by atomic-layer-by-layer molecular beam epitaxy. The lattice de-fects and residual strain in these films were…

Materials Science · Physics 2007-05-23 Jiaqing He , Robert F. Klie , Gennady Logvenov , Ivan Bozovic , Yimei Zhu

We show that a ferromagnetic (FM) order in the orthorhombic CaRuO3, which is a non-magnetic and iso-structural analog of FM system SrRuO3, can be established and stabilized by the means of tensile epitaxial strain. Investigations on the…

Materials Science · Physics 2013-01-15 Shivendra Tripathi , Rakesh Rana , Parul Pandey , R. S. Singh , D. S. Rana

The mixed-valent spinel LiV$_{2}$O$_{4}$ is known as the first oxide heavy-fermion system. There is a general consensus that a subtle interplay of charge, spin, and orbital degrees of freedom of correlated electrons plays a crucial role in…

Strongly Correlated Electrons · Physics 2022-06-24 U. Niemann , Y. -M. Wu , R. Oka , D. Hirai , Y. Wang , Y. E. Suyolcu , Minu Kim , P. A. van Aken , H. Takagi

The electronic and magnetic properties in ABO3 perovskite oxides are extremely sensitive to lattice structure but also the dimensionality, such as the thickness in thin film form. Here, we report the thickness-dependent electro-magnetic…

Materials Science · Physics 2022-12-26 Zeeshan Ali , Mohammad Saghayezhian , Prahald Siwakoti , Roshan Nepal , Jiandi Zhang

Complex oxides are mesmerizing material systems to realize multiple physical properties and functionalities by integrating different elements in a single compound. However, owing to the chemical instability, not all the combinations of…

Materials Science · Physics 2024-03-15 L. -F. Zhang , T. C. Fujita , Y. Masutake , M. Kawamura , T. Arima , H. Kumigashira , M. Tokunaga , M. Kawasaki

Perovskite LaTiO$_3$ bulk is a typical Mott-insulator with G-type antiferromagnetic order. In this work, the biaxial strain effects on the ground magnetic order of LaTiO$_3$ films grown on various substrates have been studied. For the…

Materials Science · Physics 2014-01-10 Yakui Weng , Xin Huang , Yankun Tang , Shuai Dong

The ferrimagnetic inverse spinel NiCo2O4 has attracted extensive research interests for its versatile electrochemical properties, robust magnetic order, high conductivity, and fast spin dynamics, as well as its highly tunable nature due to…

Materials Science · Physics 2023-05-25 Xiaoshan Xu , Corbyn Mellinger , Zhi Gang Cheng , Xuegang Chen , Xia Hong

The dynamics of the charge ordered (CO) state under non-equilibrium conditions created by strong dc-electric field (~106 V/cm) and photo-illumination with short (~ 6 ns) laser pulses is investigated in Bi1-xCaxMnO3 (x > 0.5) epitaxial…

Strongly Correlated Electrons · Physics 2007-05-23 S. Chaudhuri , R. C. Budhani

TbMnO$_{3}$ films have been grown under compressive strain on (001)-oriented SrTiO$_{3}$ crystals. They have an orthorhombic structure and display the (001) orientation. With increasing thickness, the structure evolves from a more symmetric…

Epitaxial strain is a proven route to enhancing the properties of complex oxides, however, the details of how the atomic structure accommodates strain are poorly understood due to the difficulty of measuring the oxygen positions in thin…

Materials Science · Physics 2015-05-18 S. J. May , J. -W. Kim , J. M. Rondinelli , E. Karapetrova , N. A. Spaldin , A. Bhattacharya , P. J. Ryan

We report on the dielectric properties of epitaxial [001] and [100]-textured thin films of antiferromagnetic orthorhombic YMnO3 and their variation under compressive epitaxial strain. It is found that weakly strained YMnO3 films are…

Materials Science · Physics 2010-12-15 J. Fontcuberta , I. Fina , L. Fàbrega , F. Sánchez , X. Martí , V. Skumryev

In order to analyse the effect of strain on the magnetic properties of narrow-band manganites, the temperature and field dependent susceptibilities of about 8.5 nm thick epitaxial Pr0.7Ca0.3MnO3 films, respectively grown on (001) and (110)…

Materials Science · Physics 2015-05-19 A. Geddo Lehmann , F. Congiu , N. Lampis , F. Miletto Granozio , P. Perna , M. Radovic , U. Scotti di Uccio

Low-dimensional quantum materials that remain strongly ferromagnetic down to mono layer thickness are highly desired for spintronic applications. Although oxide materials are important candidates for next generation of spintronic,…

We use first-principles calculations to investigate the stability of bi-axially strained \textit{Pnma} perovskite CaMnO$_3$ towards the formation of oxygen vacancies. Our motivation is provided by promising indications that novel material…

Materials Science · Physics 2013-08-28 Ulrich Aschauer , Reto Pfenninger , Sverre M. Selbach , Tor Grande , Nicola A. Spaldin