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Title: Ferroelectric capped magnetization in multiferroic PZT/LSMO tunnel junctions

Abstract

Self-poled ultra-thin ferroelectric PbZr{sub 0.52}Ti{sub 0.48}O{sub 3} (PZT) (5 and 7 nm) films have been grown by pulsed laser deposition technique on ferromagnetic La{sub 0.67}Sr{sub 0.33}MnO{sub 3} (LSMO) (30 nm) to check the effect of polar capping on magnetization for ferroelectric tunnel junction devices. PZT/LSMO heterostructures with thick polar PZT (7 nm) capping show nearly 100% enhancement in magnetization compared with thin polar PZT (5 nm) films, probably due to excess hole transfer from the ferroelectric to the ferromagnetic layers. Core-level x-ray photoelectron spectroscopy studies revealed the presence of larger Mn 3s exchange splitting and higher Mn{sup 3+}/Mn{sup 4+} ion ratio in the LSMO with 7 nm polar capping.

Authors:
;  [1]; ; ;  [2];  [3];  [4]
  1. National Physical Laboratory (CSIR), Dr. K. S. Krishnan Road, New Delhi-110012 (India)
  2. Department of Physics and Institute of Functional Nanomaterials, University of Puerto Rico, San Juan, Puerto Rico 00931-3343 (United States)
  3. Institute of Materials Research and Engineering - IMRE, Agency for Science Technology and Research (A-STAR), 3 Research Link, Singapore 117602 (Singapore)
  4. Department of Chemistry and Department of Physics, University of St. Andrews, St. Andrews KY16 ST (United Kingdom)
Publication Date:
OSTI Identifier:
22398825
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 13; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPARATIVE EVALUATIONS; ENERGY BEAM DEPOSITION; FERROELECTRIC MATERIALS; FERROMAGNETIC MATERIALS; FERROMAGNETISM; FILMS; HOLES; LANTHANUM COMPOUNDS; LASER RADIATION; LAYERS; MAGNETIZATION; MANGANATES; MANGANESE IONS; PULSED IRRADIATION; PZT; TUNNEL EFFECT; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Kumar, Ashok, E-mail: ashok553@nplindia.org, Shukla, A. K., Barrionuevo, D., Ortega, N., Katiyar, Ram S., Shannigrahi, Santiranjan, and Scott, J. F. Ferroelectric capped magnetization in multiferroic PZT/LSMO tunnel junctions. United States: N. p., 2015. Web. doi:10.1063/1.4916732.
Kumar, Ashok, E-mail: ashok553@nplindia.org, Shukla, A. K., Barrionuevo, D., Ortega, N., Katiyar, Ram S., Shannigrahi, Santiranjan, & Scott, J. F. Ferroelectric capped magnetization in multiferroic PZT/LSMO tunnel junctions. United States. doi:10.1063/1.4916732.
Kumar, Ashok, E-mail: ashok553@nplindia.org, Shukla, A. K., Barrionuevo, D., Ortega, N., Katiyar, Ram S., Shannigrahi, Santiranjan, and Scott, J. F. Mon . "Ferroelectric capped magnetization in multiferroic PZT/LSMO tunnel junctions". United States. doi:10.1063/1.4916732.
@article{osti_22398825,
title = {Ferroelectric capped magnetization in multiferroic PZT/LSMO tunnel junctions},
author = {Kumar, Ashok, E-mail: ashok553@nplindia.org and Shukla, A. K. and Barrionuevo, D. and Ortega, N. and Katiyar, Ram S. and Shannigrahi, Santiranjan and Scott, J. F.},
abstractNote = {Self-poled ultra-thin ferroelectric PbZr{sub 0.52}Ti{sub 0.48}O{sub 3} (PZT) (5 and 7 nm) films have been grown by pulsed laser deposition technique on ferromagnetic La{sub 0.67}Sr{sub 0.33}MnO{sub 3} (LSMO) (30 nm) to check the effect of polar capping on magnetization for ferroelectric tunnel junction devices. PZT/LSMO heterostructures with thick polar PZT (7 nm) capping show nearly 100% enhancement in magnetization compared with thin polar PZT (5 nm) films, probably due to excess hole transfer from the ferroelectric to the ferromagnetic layers. Core-level x-ray photoelectron spectroscopy studies revealed the presence of larger Mn 3s exchange splitting and higher Mn{sup 3+}/Mn{sup 4+} ion ratio in the LSMO with 7 nm polar capping.},
doi = {10.1063/1.4916732},
journal = {Applied Physics Letters},
number = 13,
volume = 106,
place = {United States},
year = {Mon Mar 30 00:00:00 EDT 2015},
month = {Mon Mar 30 00:00:00 EDT 2015}
}