Probing charge/orbital correlation in La1.2Sr1.8Mn2O7 by Raman spectroscopy

Ki Ichi Yamamoto; Tsuyoshi Kimura; Tadahiko Ishikawa; Takuro Katsufuji; Yoshinori Tokura

doi:10.1143/JPSJ.68.2538

Probing charge/orbital correlation in La_1.2Sr_1.8Mn₂O₇ by Raman spectroscopy

Ki Ichi Yamamoto^*, Tsuyoshi Kimura, Tadahiko Ishikawa, Takuro Katsufuji, Yoshinori Tokura

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

Raman spectra have been investigated for a single crystal of La_1.2Sr_1.8Mn₂O₇ that shows colossal magnetoresistance around the Curie temperature Tc = 126K. Several broad phonon peaks grow with decrease of temperature down to T_C but disappear below T_C, which can be clearly ascribed to a change in the charge/orbital correlation by comparison with the spectra for the charge/orbital ordered states of the layered manganites (La_0.5Sr_1.5MnO₄ and LaSr₂Mn₂O₇). Such a real-space charge density fluctuation is also observed to cause the low-energy diffuse Raman response, the B_1g component of which is critically suppressed below T_C as well.

Original language	English
Pages (from-to)	2538-2541
Number of pages	4
Journal	journal of the physical society of japan
Volume	68
Issue number	8
DOIs	https://doi.org/10.1143/JPSJ.68.2538
Publication status	Published - 1999 Aug
Externally published	Yes

Keywords

Charge/orbital ordering
Colossal magnetoresistance (CMR)
LaSrMnO
Layered manganites
Raman scattering

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.68.2538

Cite this

@article{02afc65d19b2409e8efb91f3144934d9,

title = "Probing charge/orbital correlation in La1.2Sr1.8Mn2O7 by Raman spectroscopy",

abstract = "Raman spectra have been investigated for a single crystal of La1.2Sr1.8Mn2O7 that shows colossal magnetoresistance around the Curie temperature Tc = 126K. Several broad phonon peaks grow with decrease of temperature down to TC but disappear below TC, which can be clearly ascribed to a change in the charge/orbital correlation by comparison with the spectra for the charge/orbital ordered states of the layered manganites (La0.5Sr1.5MnO4 and LaSr2Mn2O7). Such a real-space charge density fluctuation is also observed to cause the low-energy diffuse Raman response, the B1g component of which is critically suppressed below TC as well.",

keywords = "Charge/orbital ordering, Colossal magnetoresistance (CMR), LaSrMnO, Layered manganites, Raman scattering",

author = "Yamamoto, {Ki Ichi} and Tsuyoshi Kimura and Tadahiko Ishikawa and Takuro Katsufuji and Yoshinori Tokura",

year = "1999",

month = aug,

doi = "10.1143/JPSJ.68.2538",

language = "English",

volume = "68",

pages = "2538--2541",

journal = "journal of the physical society of japan",

issn = "0031-9015",

publisher = "Physical Society of Japan",

number = "8",

}

TY - JOUR

T1 - Probing charge/orbital correlation in La1.2Sr1.8Mn2O7 by Raman spectroscopy

AU - Yamamoto, Ki Ichi

AU - Kimura, Tsuyoshi

AU - Ishikawa, Tadahiko

AU - Katsufuji, Takuro

AU - Tokura, Yoshinori

PY - 1999/8

Y1 - 1999/8

N2 - Raman spectra have been investigated for a single crystal of La1.2Sr1.8Mn2O7 that shows colossal magnetoresistance around the Curie temperature Tc = 126K. Several broad phonon peaks grow with decrease of temperature down to TC but disappear below TC, which can be clearly ascribed to a change in the charge/orbital correlation by comparison with the spectra for the charge/orbital ordered states of the layered manganites (La0.5Sr1.5MnO4 and LaSr2Mn2O7). Such a real-space charge density fluctuation is also observed to cause the low-energy diffuse Raman response, the B1g component of which is critically suppressed below TC as well.

AB - Raman spectra have been investigated for a single crystal of La1.2Sr1.8Mn2O7 that shows colossal magnetoresistance around the Curie temperature Tc = 126K. Several broad phonon peaks grow with decrease of temperature down to TC but disappear below TC, which can be clearly ascribed to a change in the charge/orbital correlation by comparison with the spectra for the charge/orbital ordered states of the layered manganites (La0.5Sr1.5MnO4 and LaSr2Mn2O7). Such a real-space charge density fluctuation is also observed to cause the low-energy diffuse Raman response, the B1g component of which is critically suppressed below TC as well.

KW - Charge/orbital ordering

KW - Colossal magnetoresistance (CMR)

KW - LaSrMnO

KW - Layered manganites

KW - Raman scattering

UR - http://www.scopus.com/inward/record.url?scp=0033420135&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033420135&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.68.2538

DO - 10.1143/JPSJ.68.2538

M3 - Article

AN - SCOPUS:0033420135

SN - 0031-9015

VL - 68

SP - 2538

EP - 2541

JO - journal of the physical society of japan

JF - journal of the physical society of japan

IS - 8

ER -