High-pressure 57Fe Mössbauer spectroscopy of LaFeAsO

Takateru Kawakami, Takanori Kamatani, Hironari Okada, Hiroki Takahashi, Saburo Nasu, Yoichi Kamihara, Masahiro Hirano, Hideo Hosono

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The electronic properties of an oxypnictide, LaFeAsO, pressurized in a diamond-anvil cell, were investigated by 57Fe Mössbauer spectroscopy and electrical resistance measurements at pressures up to 24 and 35GPa, respectively. The Néel temperature gradually decreased from ∼140K at 0.1 MPa to ∼50 K at 20 GPa, and fell below 8 K or disappeared at 24 GPa. The hyperfine field at 8 K decreased from 5.3 T at 0.1 MPa to 2.2 T at 20 GPa. On the other hand, the onset of superconductivity occurred at ∼9 K at 2 GPa. The superconductivity peaked at ∼21 K at 12 GPa, and then began a perceptible decline, disappearing at ∼35 GPa. This suggests that suppression of antiferromagnetic order plays an important role in the emergence of pressure-induced superconductivity.

Original languageEnglish
Article number123703
JournalJournal of the Physical Society of Japan
Volume78
Issue number12
DOIs
Publication statusPublished - 2009 Dec
Externally publishedYes

Fingerprint

superconductivity
spectroscopy
anvils
electrical resistance
diamonds
retarding
cells
electronics
temperature

Keywords

  • Fe Mössbauer spectroscopy
  • Electrical resistance
  • High pressure
  • LaFeAsO
  • Magnetism
  • Superconductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Kawakami, T., Kamatani, T., Okada, H., Takahashi, H., Nasu, S., Kamihara, Y., ... Hosono, H. (2009). High-pressure 57Fe Mössbauer spectroscopy of LaFeAsO. Journal of the Physical Society of Japan, 78(12), [123703]. https://doi.org/10.1143/JPSJ.78.123703

High-pressure 57Fe Mössbauer spectroscopy of LaFeAsO. / Kawakami, Takateru; Kamatani, Takanori; Okada, Hironari; Takahashi, Hiroki; Nasu, Saburo; Kamihara, Yoichi; Hirano, Masahiro; Hosono, Hideo.

In: Journal of the Physical Society of Japan, Vol. 78, No. 12, 123703, 12.2009.

Research output: Contribution to journalArticle

Kawakami, T, Kamatani, T, Okada, H, Takahashi, H, Nasu, S, Kamihara, Y, Hirano, M & Hosono, H 2009, 'High-pressure 57Fe Mössbauer spectroscopy of LaFeAsO', Journal of the Physical Society of Japan, vol. 78, no. 12, 123703. https://doi.org/10.1143/JPSJ.78.123703
Kawakami, Takateru ; Kamatani, Takanori ; Okada, Hironari ; Takahashi, Hiroki ; Nasu, Saburo ; Kamihara, Yoichi ; Hirano, Masahiro ; Hosono, Hideo. / High-pressure 57Fe Mössbauer spectroscopy of LaFeAsO. In: Journal of the Physical Society of Japan. 2009 ; Vol. 78, No. 12.
@article{b09d0917b41046059ed22761029f7951,
title = "High-pressure 57Fe M{\"o}ssbauer spectroscopy of LaFeAsO",
abstract = "The electronic properties of an oxypnictide, LaFeAsO, pressurized in a diamond-anvil cell, were investigated by 57Fe M{\"o}ssbauer spectroscopy and electrical resistance measurements at pressures up to 24 and 35GPa, respectively. The N{\'e}el temperature gradually decreased from ∼140K at 0.1 MPa to ∼50 K at 20 GPa, and fell below 8 K or disappeared at 24 GPa. The hyperfine field at 8 K decreased from 5.3 T at 0.1 MPa to 2.2 T at 20 GPa. On the other hand, the onset of superconductivity occurred at ∼9 K at 2 GPa. The superconductivity peaked at ∼21 K at 12 GPa, and then began a perceptible decline, disappearing at ∼35 GPa. This suggests that suppression of antiferromagnetic order plays an important role in the emergence of pressure-induced superconductivity.",
keywords = "Fe M{\"o}ssbauer spectroscopy, Electrical resistance, High pressure, LaFeAsO, Magnetism, Superconductivity",
author = "Takateru Kawakami and Takanori Kamatani and Hironari Okada and Hiroki Takahashi and Saburo Nasu and Yoichi Kamihara and Masahiro Hirano and Hideo Hosono",
year = "2009",
month = "12",
doi = "10.1143/JPSJ.78.123703",
language = "English",
volume = "78",
journal = "Journal of the Physical Society of Japan",
issn = "0031-9015",
publisher = "Physical Society of Japan",
number = "12",

}

TY - JOUR

T1 - High-pressure 57Fe Mössbauer spectroscopy of LaFeAsO

AU - Kawakami, Takateru

AU - Kamatani, Takanori

AU - Okada, Hironari

AU - Takahashi, Hiroki

AU - Nasu, Saburo

AU - Kamihara, Yoichi

AU - Hirano, Masahiro

AU - Hosono, Hideo

PY - 2009/12

Y1 - 2009/12

N2 - The electronic properties of an oxypnictide, LaFeAsO, pressurized in a diamond-anvil cell, were investigated by 57Fe Mössbauer spectroscopy and electrical resistance measurements at pressures up to 24 and 35GPa, respectively. The Néel temperature gradually decreased from ∼140K at 0.1 MPa to ∼50 K at 20 GPa, and fell below 8 K or disappeared at 24 GPa. The hyperfine field at 8 K decreased from 5.3 T at 0.1 MPa to 2.2 T at 20 GPa. On the other hand, the onset of superconductivity occurred at ∼9 K at 2 GPa. The superconductivity peaked at ∼21 K at 12 GPa, and then began a perceptible decline, disappearing at ∼35 GPa. This suggests that suppression of antiferromagnetic order plays an important role in the emergence of pressure-induced superconductivity.

AB - The electronic properties of an oxypnictide, LaFeAsO, pressurized in a diamond-anvil cell, were investigated by 57Fe Mössbauer spectroscopy and electrical resistance measurements at pressures up to 24 and 35GPa, respectively. The Néel temperature gradually decreased from ∼140K at 0.1 MPa to ∼50 K at 20 GPa, and fell below 8 K or disappeared at 24 GPa. The hyperfine field at 8 K decreased from 5.3 T at 0.1 MPa to 2.2 T at 20 GPa. On the other hand, the onset of superconductivity occurred at ∼9 K at 2 GPa. The superconductivity peaked at ∼21 K at 12 GPa, and then began a perceptible decline, disappearing at ∼35 GPa. This suggests that suppression of antiferromagnetic order plays an important role in the emergence of pressure-induced superconductivity.

KW - Fe Mössbauer spectroscopy

KW - Electrical resistance

KW - High pressure

KW - LaFeAsO

KW - Magnetism

KW - Superconductivity

UR - http://www.scopus.com/inward/record.url?scp=73849116687&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=73849116687&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.78.123703

DO - 10.1143/JPSJ.78.123703

M3 - Article

AN - SCOPUS:73849116687

VL - 78

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

SN - 0031-9015

IS - 12

M1 - 123703

ER -