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Title: Escalated Phase Separation Driven Enhanced Magnetoresistance in Manganite/Iridate Epitaxial Heterostructures

Journal Article · · Advanced Physics Research

Phase separation in manganites leads to unique magnetic and electronic properties. 50% Ca-doped LaMnO3 (LCMO), at the boundary of ferromagnetic (FM) and antiferromagnetic (AFM) states in La1-xCaxMnO3 (0 ≤ x ≤ 1), is an ideal system to study phase separation behavior. The investigation reveals the effect of a 5d-metal perovskite SrIrO3 (SIO) on the phase separation, magnetic, and magnetoresistance (MR) properties of LCMO. Single-layer and bilayer LCMO films, both appear purely ferromagnetic along the in-plane (IP) magnetic field direction, but show the tendency of temperature-dependent ferromagnetic and antiferromagnetic or charge-ordered (CO) phase separation with the out-of-plane (OOP) applied field. The MR, and colossal magnetoresistance (CMR), observed in LCMO/SIO bilayers are two orders and an order of magnitude (in %) larger, respectively than that in the single-layer film. The coexistence of FM and AFM/CO phases is responsible for the CMR and MR enhancement in the LCMO/SIO bilayer, pointing toward the importance of the phase separation and competition of both the individual materials in enhancing their magnetic and electronic properties.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
89233218CNA000001; ECCS-1902623
OSTI ID:
2217517
Alternate ID(s):
OSTI ID: 2340881
Report Number(s):
LA-UR-23-32756; LA-UR-23-26510
Journal Information:
Advanced Physics Research, Vol. 3, Issue 1; ISSN 2751-1200
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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