Observation of photoinduced phase transition in phase-separated Pr0.55 (Ca1-y Sry) 0.45 Mn O3 thin films via x-ray photoemission spectroscopy

K. Takubo, J. Y. Son, Takashi Mizokawa, N. Takubo, K. Miyano

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Perovskite manganite thin films, Pr0.55 (Ca1-y Sry) 0.45 Mn O3, have been studied using x-ray photoemission spectroscopy in order to clarify the consequence of the competition between ferromagnetic metal (FM) and charge-orbital-ordered insulator (COOI). Films with y=0.40 undergo a uniform paramagnetic insulator to FM transition. On the other hand, in films with y=0.25, the composition near the bicritical point, phase separation of COOI and FM domains is indicated by the spectral change below 125 K. Interestingly, between 50 K and 70 K, the visible laser illumination transfers the COOI-like spectra obtained in cooling process to the FM-like spectra obtained in warming process. This indicates that the photoinduced insulator to metal transition is governed by the increase of the FM volume fraction and is deeply related to the phase separation between the FM and COOI states.

Original languageEnglish
Article number052408
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume75
Issue number5
DOIs
Publication statusPublished - 2007 Feb 16
Externally publishedYes

Fingerprint

Ferromagnetic materials
Photoelectron spectroscopy
photoelectric emission
Phase transitions
insulators
X rays
Thin films
thin films
spectroscopy
orbitals
x rays
metals
Phase separation
transition metals
Perovskite
Transition metals
Volume fraction
Lighting
illumination
Cooling

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

@article{4af2e110d25049faae731059534b420f,
title = "Observation of photoinduced phase transition in phase-separated Pr0.55 (Ca1-y Sry) 0.45 Mn O3 thin films via x-ray photoemission spectroscopy",
abstract = "Perovskite manganite thin films, Pr0.55 (Ca1-y Sry) 0.45 Mn O3, have been studied using x-ray photoemission spectroscopy in order to clarify the consequence of the competition between ferromagnetic metal (FM) and charge-orbital-ordered insulator (COOI). Films with y=0.40 undergo a uniform paramagnetic insulator to FM transition. On the other hand, in films with y=0.25, the composition near the bicritical point, phase separation of COOI and FM domains is indicated by the spectral change below 125 K. Interestingly, between 50 K and 70 K, the visible laser illumination transfers the COOI-like spectra obtained in cooling process to the FM-like spectra obtained in warming process. This indicates that the photoinduced insulator to metal transition is governed by the increase of the FM volume fraction and is deeply related to the phase separation between the FM and COOI states.",
author = "K. Takubo and Son, {J. Y.} and Takashi Mizokawa and N. Takubo and K. Miyano",
year = "2007",
month = "2",
day = "16",
doi = "10.1103/PhysRevB.75.052408",
language = "English",
volume = "75",
journal = "Physical Review B-Condensed Matter",
issn = "0163-1829",
publisher = "American Institute of Physics Publising LLC",
number = "5",

}

TY - JOUR

T1 - Observation of photoinduced phase transition in phase-separated Pr0.55 (Ca1-y Sry) 0.45 Mn O3 thin films via x-ray photoemission spectroscopy

AU - Takubo, K.

AU - Son, J. Y.

AU - Mizokawa, Takashi

AU - Takubo, N.

AU - Miyano, K.

PY - 2007/2/16

Y1 - 2007/2/16

N2 - Perovskite manganite thin films, Pr0.55 (Ca1-y Sry) 0.45 Mn O3, have been studied using x-ray photoemission spectroscopy in order to clarify the consequence of the competition between ferromagnetic metal (FM) and charge-orbital-ordered insulator (COOI). Films with y=0.40 undergo a uniform paramagnetic insulator to FM transition. On the other hand, in films with y=0.25, the composition near the bicritical point, phase separation of COOI and FM domains is indicated by the spectral change below 125 K. Interestingly, between 50 K and 70 K, the visible laser illumination transfers the COOI-like spectra obtained in cooling process to the FM-like spectra obtained in warming process. This indicates that the photoinduced insulator to metal transition is governed by the increase of the FM volume fraction and is deeply related to the phase separation between the FM and COOI states.

AB - Perovskite manganite thin films, Pr0.55 (Ca1-y Sry) 0.45 Mn O3, have been studied using x-ray photoemission spectroscopy in order to clarify the consequence of the competition between ferromagnetic metal (FM) and charge-orbital-ordered insulator (COOI). Films with y=0.40 undergo a uniform paramagnetic insulator to FM transition. On the other hand, in films with y=0.25, the composition near the bicritical point, phase separation of COOI and FM domains is indicated by the spectral change below 125 K. Interestingly, between 50 K and 70 K, the visible laser illumination transfers the COOI-like spectra obtained in cooling process to the FM-like spectra obtained in warming process. This indicates that the photoinduced insulator to metal transition is governed by the increase of the FM volume fraction and is deeply related to the phase separation between the FM and COOI states.

UR - http://www.scopus.com/inward/record.url?scp=33847029644&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33847029644&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.75.052408

DO - 10.1103/PhysRevB.75.052408

M3 - Article

VL - 75

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 0163-1829

IS - 5

M1 - 052408

ER -