Journal
PHYSICAL REVIEW B
Volume 89, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.89.094511
Keywords
-
Funding
- Schweizer Nationalfonds (SNF) [200020-140225, 206021-139102]
- National Centre of Competence in Research Materials with Novel Electronic PropertiesMaNEP
- US Department of Energy (DOE), Basic Energy Sciences (BES), Materials Sciences and Engineering Division
- ERC starting Investigator Award, [239739]
- European Commission [283883]
- Swiss National Science Foundation (SNF) [200020_140225, 206021_139102] Funding Source: Swiss National Science Foundation (SNF)
- European Research Council (ERC) [239739] Funding Source: European Research Council (ERC)
Ask authors/readers for more resources
Epitaxial La1.85Sr0.15CuO4/ La2/ 3Ca1/ 3MnO3 ( LSCO/ LCMO) superlattices on ( 001)-oriented LaSrAlO4 substrates have been grown with pulsed laser deposition technique. Their structural, magnetic, and superconducting properties have been determined with in situ reflection high-energy electron diffraction, x-ray diffraction, specular neutron reflectometry, scanning transmission electron microscopy, electric transport, and magnetization measurements. We find that despite the large mismatch between the in-plane lattice parameters of LSCO (a = 0.3779 nm) and LCMO (a = 0.387 nm) these superlattices can be grown epitaxially and with a high crystalline quality. While the first LSCO layer remains clamped to the LaSrAlO4 substrate, a sizable strain relaxation occurs already in the first LCMO layer. The following LSCO and LCMO layers adopt a nearly balanced state in which the tensile and compressive strain effects yield alternating in-plane lattice parameters with an almost constant average value. No major defects are observed in the LSCO layers, while a significant number of vertical antiphase boundaries are found in the LCMOlayers. The LSCO layers remain superconducting with a relatively high superconducting onset temperature of T onset c approximate to 36 K. The macroscopic superconducting response is also evident in the magnetization data due to a weak diamagnetic signal below 10 K for H parallel to ab and a sizable paramagnetic shift for H parallel to c that can be explained in terms of a vortex-pinning-induced flux compression. The LCMO layers maintain a strongly ferromagnetic state with a Curie temperature of T Curie approximate to 190 K and a large low-temperature saturation moment of about 3.5(1) mu(B) per Mn ion. These results suggest that the LSCO/ LCMO superlattices can be used to study the interaction between the antagonistic ferromagnetic and superconducting orders and, in combination with previous studies on YBa2Cu3O7-x/ La2/ 3Ca1/ 3MnO3 superlattices, may allow one to identify the relevant mechanisms.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available