Anomalous magnetic ground state in LaAlO3/SrTiO3 interface probed by transport through nanowires

Abstract

Resistance as a function of temperature down to 20mK and magnetic fields up to 18T for various carrier concentrations is measured for nanowires made from the SrTiO3/LaAlO3 interface using a hard mask shadow deposition technique. The narrow width of the wires (of the order of 50nm) allows us to separate out the magnetic effects from the dominant superconducting ones at low magnetic fields. At this regime hysteresis loops are observed along with the superconducting transition. From our data analysis we find that the magnetic order probed by the giant magnetoresistance (GMR) effect vanishes at TCurie = 954 mK. This order is not a simple ferromagnetic state but consists of domains with opposite magnetization having a preferred in-plane orientation.

arXiv comment5 pages 5 figures

References in corpus (22)

• Magnetic effects at the interface between nonmagnetic oxides
• Direct imaging of the coexistence of ferromagnetism and superconductivity at the LaAlO3/SrTiO3 interface
• Coexistence of Magnetic Order and Two-dimensional Superconductivity at LaAlO${}_3$/SrTiO${}_3$ Interfaces
• The role of oxygen vacancies in SrTiO3 at the LaAlO3/SrTiO3 interface
• Quantum suppression of superconductivity in ultrathin nanowires
• Coexistence of superconductivity and ferromagnetism in two dimensions
• Tuning spin-orbit coupling and superconductivity at the SrTiO3/LaAlO3 interface: a magneto-transport study
• Superconductivity and Ferromagnetism in Oxide Interface Structures: Possibility of Finite Momentum Pairing
• Critical thickness for ferromagnetism in LaAlO3/SrTiO3 heterostructures
• Origin of interface magnetism in BiMnO3/SrTiO3 and LaAlO3/SrTiO3 heterostructures
• Ferromagnetic exchange, spin-orbit coupling and spiral magnetism at the LaAlO_3/SrTiO_3 interface
• Shubnikov-de Haas oscillations in SrTiO3\LaAlO3 interface
• Anisotropic magneto-transport effects at SrTiO3\LaAlO3 interfaces
• Upper limit to magnetism in LaAlO3/SrTiO3 heterostructures
• Nature of weak magnetism in SrTiO3/LaAlO3 multilayers
• In-plane electronic confinement in superconducting LaAlO${}_3$/SrTiO${}_3$ nanostructures
• Antisymmetric magnetoresistance of the SrTiO3/LaAlO3 interface
• Competition Between Kondo Screening and Magnetism at the LaAlO${}_3$/SrTiO${}_3$ Interface
• One-dimensional Quantum Wire Formed at the Boundary Between Two Insulating LaAlO3/SrTiO3 Interfaces
• Anomalous Transport in Sketched Nanostructures at the LaAlO3/SrTiO3 Interface
• Phase coherent transport in SrTiO3/LaAlO3 interfaces
• Magnetotransport effects in polar versus non-polar SrTiO3 based heterostructures

Cited by in corpus (19)

• Physics of SrTiO${}_3$-based heterostructures and nanostructures: a review
• Strong correlations elucidate the electronic structure and phase-diagram of LaAlO3/SrTiO3 interface
• Six-fold crystalline anisotropic magnetoresistance in the (111) LaAlO${}_3$/SrTiO${}_3$ oxide interface
• One-Dimensional Nature of Pairing and Superconductivity at the LaAlO${}_3$/SrTiO${}_3$ Interface
• Field Effect Transistors with Sub-Micrometer Gate Lengths Fabricated from LaAlO${}_3$-SrTiO${}_3$-Based Heterostructures
• Symmetry and correlation effects on band structure explain the anomalous transport properties of (111) LaAlO${}_3$/SrTiO${}_3$
• Interface exchange processes in LaAlO${}_3$/SrTiO${}_3$ induced by oxygen vacancies
• Multi-band theory of superconductivity at the LaAlO${}_3$/SrTiO${}_3$ interface
• Gate-tunable hallmarks of unconventional superconductivity in non-centrosymmetric nanowires
• Nanoscale control of the metal-insulator transition at LAO/KTO (110) and LAO/KTO (111) interfaces
• Ferroelectric Exchange Bias Affects Interfacial Electronic States
• Tunneling into a quantum confinement created by a single-step nano-lithography of conducting oxide interfaces
• Artificial Atoms Based on Correlated Materials
• Anomalous transport near the Lifshitz transition at the LaAlO${}_3$/SrTiO${}_3$ interface
• Vortex excitations in the Insulating State of an Oxide Interface
• Correlation-Induced Band Competition in SrTiO3/LaAlO3
• Solution Monolayer Epitaxy for Tunable Atomically Sharp Oxide Interfaces
• Strong spin-orbit coupling and magnetism in (111) (La${}_{0.3}$Sr${}_{0.7}$)(Al${}_{0.65}$Ta${}_{0.35})$/SrTiO${}_3$
• Nanopatterning process based on epitaxial masking for the fabrication of electronic and spintronic devices made of La0.67Sr0.33MnO3/LaAlO3/SrTiO3 heterostructures with in situ interfaces