Engineering Large Anisotropic Magnetoresistance in La0.7Sr0.3MnO3 Films at Room Temperature

Abstract

The magnetoresistance (MR) effect is widely employed in technologies that pervade our world from magnetic reading heads to sensors. Diverse contributions to MR, such as anisotropic, giant, tunnel, colossal, and spin-Hall, are revealed in materials depending on the specific system and measuring configuration. Half-metallic manganites hold promise for spintronic applications but the complexity of competing interactions has not permitted the understanding and control of their magnetotransport properties to enable the realization of their technological potential. Here we report on the ability to induce a dominant switchable magnetoresistance in La0.7Sr0.3MnO3 epitaxial films, at room temperature (RT). By engineering an extrinsic magnetic anisotropy, we show a large enhancement of anisotropic magnetoresistance (AMR) which leads to, at RT, signal changes much larger than the other contributions such as the colossal magnetoresistance (CMR). The dominant extrinsic AMR exhibits large variation in the resistance in low field region, showing high sensitivity to applied low magnetic fields. These findings have a strong impact on the real applications of manganite based devices for the high-resolution low field magnetic sensors or spintronics.

arXiv comment10 pages, 6 figures

References in corpus (7)

• Complexity in Strongly Correlated Electronic Systems
• Transport properties in manganite thin films
• Tailoring magnetic anisotropy in epitaxial half metallic La0.7Sr0.3MnO3 thin films
• An extensive comparison of anisotropies in MBE grown (Ga,Mn)As material
• Interfacial exchange coupling induced chiral symmetry-breaking of Spin-Orbit effects
• Direct Observation of Spectroscopic Inhomogeneities on La0.7Sr0.3MnO3 Thin Films by Scanning Tunnelling Spectroscopy
• Comment on ''the controlled charge ordering and evidence of the metallic state in Pr${}_{0.65}$Ca${}_{0.35}$MnO${}_3$ films''

Cited by in corpus (4)

• Nonreciprocal transport in a Rashba ferromagnet, delafossite PdCoO${}_2$
• Room temperature biaxial magnetic anisotropy in La0.67Sr0.33MnO3 thin films on SrTiO3 buffered MgO (001) substrates for spintronic applications
• Light induced decoupling of electronic and magnetic properties in manganites
• Atomic Origins of Magnetic Anisotropy in Ru-substituted Manganite Films