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Title: Magnetic Ordering of Implanted Mn in HOPG Substrates

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1136676
Report Number(s):
SLAC-REPRINT-2014-213
Journal ID: ISSN 2469-9950
DOE Contract Number:
AC02-76SF00515
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review B; Journal Volume: 88; Journal Issue: 17
Country of Publication:
United States
Language:
English
Subject:
MATSCI

Citation Formats

Gucchait, Samaresh, Ohldag, Hendrik, Arenholz, Elke, Ferrer, Domingo A., Mehta, Apurva, and Banerjee, Sanjay K. Magnetic Ordering of Implanted Mn in HOPG Substrates. United States: N. p., 2014. Web. doi:10.1103/PhysRevB.88.174425.
Gucchait, Samaresh, Ohldag, Hendrik, Arenholz, Elke, Ferrer, Domingo A., Mehta, Apurva, & Banerjee, Sanjay K. Magnetic Ordering of Implanted Mn in HOPG Substrates. United States. doi:10.1103/PhysRevB.88.174425.
Gucchait, Samaresh, Ohldag, Hendrik, Arenholz, Elke, Ferrer, Domingo A., Mehta, Apurva, and Banerjee, Sanjay K. Thu . "Magnetic Ordering of Implanted Mn in HOPG Substrates". United States. doi:10.1103/PhysRevB.88.174425.
@article{osti_1136676,
title = {Magnetic Ordering of Implanted Mn in HOPG Substrates},
author = {Gucchait, Samaresh and Ohldag, Hendrik and Arenholz, Elke and Ferrer, Domingo A. and Mehta, Apurva and Banerjee, Sanjay K.},
abstractNote = {},
doi = {10.1103/PhysRevB.88.174425},
journal = {Physical Review B},
number = 17,
volume = 88,
place = {United States},
year = {Thu Jul 10 00:00:00 EDT 2014},
month = {Thu Jul 10 00:00:00 EDT 2014}
}
  • Epimore » taxial La 1.85 Sr 0.15 CuO 4 / La 2 / 3 Ca 1 / 3 MnO 3 (LSCO/LCMO) superlattices (SL) on (001)- oriented LaSrAlO 4 substrates have been grown with pulsed laser deposition (PLD) technique. Their structural, magnetic and superconducting properties have been determined with in-situ reflection high energy electron diffraction (RHEED), x-ray diffraction, specular neutron reflectometry, scanning transmission electron microscopy (STEM), 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 LSAO substrate, a sizeable 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 LCMO layers. The LSCO layers remain superconducting with a relatively high superconducting onset temperature of T c onset ≈ 36 K. The macroscopic superconducting response is also evident in the magnetization data due to a weak diamagnetic signal below 10 K for H ∥ ab and a sizeable paramagnetic shift for H ∥ 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 ≈ 190 K and a large low-temperature saturation moment of about 3.5 (1) μ B. 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 YBCO/LCMO superlattices, may allow one to identify the relevant mechanisms.« less
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