Large linear magnetoresistance in heavily-doped Nb:SrTiO3 epitaxial thin films
نویسندگان
چکیده
Interaction between electrons has long been a focused topic in condensed-matter physics since it has led to the discoveries of astonishing phenomena, for example, high-Tc superconductivity and colossal magnetoresistance (CMR) in strongly-correlated materials. In the study of strongly-correlated perovskite oxides, Nb-doped SrTiO3 (Nb:SrTiO3) has been a workhorse not only as a conducting substrate, but also as a host possessing high carrier mobility. In this work, we report the observations of large linear magnetoresistance (LMR) and the metal-to-insulator transition (MIT) induced by magnetic field in heavily-doped Nb:STO (SrNb0.2Ti0.8O3) epitaxial thin films. These phenomena are associated with the interplay between the large classical MR due to high carrier mobility and the electronic localization effect due to strong spin-orbit coupling, implying that heavily Nb-doped Sr(Nb0.2Ti0.8)O3 is promising for the application in spintronic devices.
منابع مشابه
Microstructure and inter-grain magnetoresistance in Ag-doped polycrystalline La0.67Sr0.33MnO3 thin films
Ag-doped La0.67Sr0.33MnO3 thin films with various Ag concentrations were deposited on (001) LaAlO3 substrates at 400 ◦C by using a dual-beam pulsedlaser deposition system. The Ag-doped films show polycrystalline structure with epitaxial c-axis columns. These columns were composed of closely arranged polyhedra of size 10–15 nm, resulting from the enhanced stressinduced grain boundary diffusion. ...
متن کاملEffect of annealing in reduced oxygen pressure on the electrical transport properties of epitaxial thin film and bulk (La1xNdx)0.7Sr0.3MnO3
Related Articles Strain modulated magnetization and colossal resistivity of epitaxial La2/3Ca1/3MnO3 film on BaTiO3 substrate Appl. Phys. Lett. 99, 092103 (2011) Magnetoresistance in epitaxial thin films of La0.85Ag0.15MnO3 produced by polymer assisted deposition Appl. Phys. Lett. 99, 083113 (2011) Natural media with negative index of refraction: Perspectives of complex transition metal oxides ...
متن کاملTunable epitaxial growth of magnetoresistive La2/3Sr1/3MnO3 thin films
We report on the growth of epitaxial La2/3Sr1/3MnO3 thin films on buffered Si~001! substrates. We show that a suitable choice of the buffer heterostructure allows one to obtain epitaxial (00h), (0hh), and ~hhh! manganite thin films. The magnetotransport properties are investigated and we have found that the low-field magnetoresistance is directly related to the width of the normal-to-plane rock...
متن کاملEpitaxial Mn-doped ZnO diluted magnetic semiconductor thin films grown by plasma-assisted molecular-beam epitaxy
A growthwindow for theMn effusion cell temperature (TMn) is demonstrated for epitaxialMn-doped ZnO (MnZnO) thin films grown on sapphire substrates using molecular-beam epitaxy. Within the growth window, the films are ferromagnetic with the largest saturated magnetization occurring at TMn1⁄4700 1C. The Curie temperature of these MnZnO diluted magnetic semiconductor thin films is above roomtemper...
متن کاملMagnetoresistance Versus Oxygen Deficiency in Epi-stabilized SrRu1 − xFe xO3 − δ Thin Films
Oxygen vacancies have a profound effect on the magnetic, electronic, and transport properties of transition metal oxide materials. Here, we studied the influence of oxygen vacancies on the magnetoresistance (MR) properties of SrRu1 - x Fe x O3 - δ epitaxial thin films (x = 0.10, 0.20, and 0.30). For this purpose, we synthesized highly strained epitaxial SrRu1 - x Fe x O3 - δ thin films with ato...
متن کامل