Creating and manipulating interfacial spin with giant magnetic response in 4f antiferromagnets

2020/01/18 by Ruyi Zhang, Zhang, Ruyi, Yujuan Pei +11
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Electronic and Structural Properties of Oxides #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Strongly Correlated Electrons (cond-mat.str-el)

paper · pdf · doi:10.48550/arxiv.2001.06664

openalex publication_date 2020/01/18 · openalex created_date 2020/01/30 · openalex updated_date 2026/07/28

Abstract

Creating and manipulating spin polarization in low-dimensional electron systems (such as two-dimensional electron gases) is fundamentally essential for spintronic applications, which is yet a challenge to date. In this work, we establish the metamagnetic phase diagram of 4f antiferromagnetic TbScO₃ and reveal its giant magnetic response to sub-tesla magnetic field, which has not been reported thus far. Utilizing this giant magnetic response, we demonstrate that the spin polarization of two-dimensional electron gas in SrTiO₃/LaTiO₃/TbScO₃ heterostructure can be manipulated successfully in aid of interfacial 3d-4f exchange interaction. Remarkably, the hysteretic magnetoresistances of two-dimensional electron gas at the SrTiO₃/LaTiO₃ interface are entirely determined by the metamagnetic phase transitions of the underlying TbScO₃ substrate. Our results pave a novel route to engineer the spin polarization of low-dimensional electron systems in 4f antiferromagnet-based heterostructures.

Related

• Unconventional spin polarization at Argon ion milled SrTiO3 Interfaces
• Spin polarization of the two-dimensional electron gas at the EuO/SrTiO₃ interface
• Orbital selective switching of ferromagnetism in an oxide quasi two-dimensional electron gas
• Emergent Ferromagnetism at LaFeO3/SrTiO3 Interface Arising from Strain-induced Spin-State Transition
• Ferromagnetic Two-dimensional Electron Gases with Magnetic Doping and Proximity Effects