Evolution of structural and magnetic properties with varying oxygen content in low-bandwidth manganite Pr0.9Ca0.1MnO3 thin films

S. Majumdar, H. Huhtinen, S. Granroth, P. Paturi

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)

Abstract

The effects of ex situ vacuum and oxygen annealing treatments on thin films of the low-bandwidth compound Pr1−xCaxMnO3 (PCMO) are investigated. Structural and magnetic measurements reveal that increased ferromagnetism can be achieved by oxygen annealing treatment, which is linked to the increased Mn4+ ion content, as observed from x-ray photoelectron spectroscopy (XPS) measurements, as well as relaxation of the substrate-induced tensile strain of the PCMO unit cell. The increased number of Mn4+ ions and partial release of strain lead to stronger double-exchange interaction in the system. Vacuum annealing increases the ferromagnetic (FM) interaction as well; however, the increased FM ordering is not directly related to the improved double-exchange interaction, as XPS measurement reveals an indication of a slight increase in Mn3+ ions in this case. Trapping of carriers in the oxygen vacancies and formation of magnetic polarons have been suggested as the causes of the increase in ferromagnetic ordering, and this is also supported by the large coercivity and longer spin memory in the vacuum annealed PCMO.
Original languageEnglish
Number of pages206002
JournalJournal of Physics: Condensed Matter
Volume24
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

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Structural properties
Magnetic properties
Exchange interactions
Vacuum
Annealing
Ions
Photoelectron spectroscopy
Oxygen
magnetic properties
bandwidth
Bandwidth
Thin films
vacuum
x ray spectroscopy
annealing
oxygen
thin films
photoelectron spectroscopy
X rays
Polarons

Cite this

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title = "Evolution of structural and magnetic properties with varying oxygen content in low-bandwidth manganite Pr0.9Ca0.1MnO3 thin films",
abstract = "The effects of ex situ vacuum and oxygen annealing treatments on thin films of the low-bandwidth compound Pr1−xCaxMnO3 (PCMO) are investigated. Structural and magnetic measurements reveal that increased ferromagnetism can be achieved by oxygen annealing treatment, which is linked to the increased Mn4+ ion content, as observed from x-ray photoelectron spectroscopy (XPS) measurements, as well as relaxation of the substrate-induced tensile strain of the PCMO unit cell. The increased number of Mn4+ ions and partial release of strain lead to stronger double-exchange interaction in the system. Vacuum annealing increases the ferromagnetic (FM) interaction as well; however, the increased FM ordering is not directly related to the improved double-exchange interaction, as XPS measurement reveals an indication of a slight increase in Mn3+ ions in this case. Trapping of carriers in the oxygen vacancies and formation of magnetic polarons have been suggested as the causes of the increase in ferromagnetic ordering, and this is also supported by the large coercivity and longer spin memory in the vacuum annealed PCMO.",
author = "S. Majumdar and H. Huhtinen and S. Granroth and P. Paturi",
year = "2012",
doi = "10.1088/0953-8984/24/20/206002",
language = "English",
volume = "24",
journal = "Journal of Physics: Condensed Matter",
issn = "0953-8984",
publisher = "Institute of Physics IOP",

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Evolution of structural and magnetic properties with varying oxygen content in low-bandwidth manganite Pr0.9Ca0.1MnO3 thin films. / Majumdar, S.; Huhtinen, H.; Granroth, S.; Paturi, P.

In: Journal of Physics: Condensed Matter, Vol. 24, 2012.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Evolution of structural and magnetic properties with varying oxygen content in low-bandwidth manganite Pr0.9Ca0.1MnO3 thin films

AU - Majumdar, S.

AU - Huhtinen, H.

AU - Granroth, S.

AU - Paturi, P.

PY - 2012

Y1 - 2012

N2 - The effects of ex situ vacuum and oxygen annealing treatments on thin films of the low-bandwidth compound Pr1−xCaxMnO3 (PCMO) are investigated. Structural and magnetic measurements reveal that increased ferromagnetism can be achieved by oxygen annealing treatment, which is linked to the increased Mn4+ ion content, as observed from x-ray photoelectron spectroscopy (XPS) measurements, as well as relaxation of the substrate-induced tensile strain of the PCMO unit cell. The increased number of Mn4+ ions and partial release of strain lead to stronger double-exchange interaction in the system. Vacuum annealing increases the ferromagnetic (FM) interaction as well; however, the increased FM ordering is not directly related to the improved double-exchange interaction, as XPS measurement reveals an indication of a slight increase in Mn3+ ions in this case. Trapping of carriers in the oxygen vacancies and formation of magnetic polarons have been suggested as the causes of the increase in ferromagnetic ordering, and this is also supported by the large coercivity and longer spin memory in the vacuum annealed PCMO.

AB - The effects of ex situ vacuum and oxygen annealing treatments on thin films of the low-bandwidth compound Pr1−xCaxMnO3 (PCMO) are investigated. Structural and magnetic measurements reveal that increased ferromagnetism can be achieved by oxygen annealing treatment, which is linked to the increased Mn4+ ion content, as observed from x-ray photoelectron spectroscopy (XPS) measurements, as well as relaxation of the substrate-induced tensile strain of the PCMO unit cell. The increased number of Mn4+ ions and partial release of strain lead to stronger double-exchange interaction in the system. Vacuum annealing increases the ferromagnetic (FM) interaction as well; however, the increased FM ordering is not directly related to the improved double-exchange interaction, as XPS measurement reveals an indication of a slight increase in Mn3+ ions in this case. Trapping of carriers in the oxygen vacancies and formation of magnetic polarons have been suggested as the causes of the increase in ferromagnetic ordering, and this is also supported by the large coercivity and longer spin memory in the vacuum annealed PCMO.

U2 - 10.1088/0953-8984/24/20/206002

DO - 10.1088/0953-8984/24/20/206002

M3 - Article

VL - 24

JO - Journal of Physics: Condensed Matter

JF - Journal of Physics: Condensed Matter

SN - 0953-8984

ER -