Local electronic state in the half-metallic ferromagnet CrO2 investigated by site-selective Cr 53 NMR measurements

Hikaru Takeda, Yasuhiro Shimizu, Yoshiaki Kobayashi, Masayuki Itoh, Takaaki Jin-No, Masahiko Isobe, Yutaka Ueda, Sho Yoshida, Yuji Muraoka, Takayoshi Yokoya

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We have made Cr53 NMR measurements on polycrystalline and single-crystalline film samples to study the local electronic state of a half-metallic ferromagnet CrO2 which has the rutile structure with one crystallographically equivalent Cr site. We observe two kinds of Cr53 NMR spectra in the ferromagnetic state of both the samples. An analysis on the hyperfine field shows the presence of two Cr sites with different orbital occupancies, suggesting that a local orbital order takes place with breaking the local symmetry in the rutile structure. This may be ascribed to the negative charge transfer between chromium and oxygen ions.

Original languageEnglish
Article number235129
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume93
Issue number23
DOIs
Publication statusPublished - Jun 15 2016

Fingerprint

Electronic states
rutile
Nuclear magnetic resonance
orbitals
nuclear magnetic resonance
Chromium
oxygen ions
electronics
Charge transfer
chromium
charge transfer
Ions
Oxygen
Crystalline materials
symmetry
ions
titanium dioxide

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Local electronic state in the half-metallic ferromagnet CrO2 investigated by site-selective Cr 53 NMR measurements. / Takeda, Hikaru; Shimizu, Yasuhiro; Kobayashi, Yoshiaki; Itoh, Masayuki; Jin-No, Takaaki; Isobe, Masahiko; Ueda, Yutaka; Yoshida, Sho; Muraoka, Yuji; Yokoya, Takayoshi.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 93, No. 23, 235129, 15.06.2016.

Research output: Contribution to journalArticle

Takeda, Hikaru ; Shimizu, Yasuhiro ; Kobayashi, Yoshiaki ; Itoh, Masayuki ; Jin-No, Takaaki ; Isobe, Masahiko ; Ueda, Yutaka ; Yoshida, Sho ; Muraoka, Yuji ; Yokoya, Takayoshi. / Local electronic state in the half-metallic ferromagnet CrO2 investigated by site-selective Cr 53 NMR measurements. In: Physical Review B - Condensed Matter and Materials Physics. 2016 ; Vol. 93, No. 23.
@article{d4aa5419de6c4d93b3383b7ee4615c6e,
title = "Local electronic state in the half-metallic ferromagnet CrO2 investigated by site-selective Cr 53 NMR measurements",
abstract = "We have made Cr53 NMR measurements on polycrystalline and single-crystalline film samples to study the local electronic state of a half-metallic ferromagnet CrO2 which has the rutile structure with one crystallographically equivalent Cr site. We observe two kinds of Cr53 NMR spectra in the ferromagnetic state of both the samples. An analysis on the hyperfine field shows the presence of two Cr sites with different orbital occupancies, suggesting that a local orbital order takes place with breaking the local symmetry in the rutile structure. This may be ascribed to the negative charge transfer between chromium and oxygen ions.",
author = "Hikaru Takeda and Yasuhiro Shimizu and Yoshiaki Kobayashi and Masayuki Itoh and Takaaki Jin-No and Masahiko Isobe and Yutaka Ueda and Sho Yoshida and Yuji Muraoka and Takayoshi Yokoya",
year = "2016",
month = "6",
day = "15",
doi = "10.1103/PhysRevB.93.235129",
language = "English",
volume = "93",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "23",

}

TY - JOUR

T1 - Local electronic state in the half-metallic ferromagnet CrO2 investigated by site-selective Cr 53 NMR measurements

AU - Takeda, Hikaru

AU - Shimizu, Yasuhiro

AU - Kobayashi, Yoshiaki

AU - Itoh, Masayuki

AU - Jin-No, Takaaki

AU - Isobe, Masahiko

AU - Ueda, Yutaka

AU - Yoshida, Sho

AU - Muraoka, Yuji

AU - Yokoya, Takayoshi

PY - 2016/6/15

Y1 - 2016/6/15

N2 - We have made Cr53 NMR measurements on polycrystalline and single-crystalline film samples to study the local electronic state of a half-metallic ferromagnet CrO2 which has the rutile structure with one crystallographically equivalent Cr site. We observe two kinds of Cr53 NMR spectra in the ferromagnetic state of both the samples. An analysis on the hyperfine field shows the presence of two Cr sites with different orbital occupancies, suggesting that a local orbital order takes place with breaking the local symmetry in the rutile structure. This may be ascribed to the negative charge transfer between chromium and oxygen ions.

AB - We have made Cr53 NMR measurements on polycrystalline and single-crystalline film samples to study the local electronic state of a half-metallic ferromagnet CrO2 which has the rutile structure with one crystallographically equivalent Cr site. We observe two kinds of Cr53 NMR spectra in the ferromagnetic state of both the samples. An analysis on the hyperfine field shows the presence of two Cr sites with different orbital occupancies, suggesting that a local orbital order takes place with breaking the local symmetry in the rutile structure. This may be ascribed to the negative charge transfer between chromium and oxygen ions.

UR - http://www.scopus.com/inward/record.url?scp=84976543893&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84976543893&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.93.235129

DO - 10.1103/PhysRevB.93.235129

M3 - Article

AN - SCOPUS:84976543893

VL - 93

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 23

M1 - 235129

ER -