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

doi:10.1103/PhysRevB.93.235129

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 Institute for Interdisciplinary Science

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

10 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 language	English
Article number	235129
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	93
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevB.93.235129
Publication status	Published - Jun 15 2016

ASJC Scopus subject areas

Condensed Matter Physics
Electronic, Optical and Magnetic Materials

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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 journal › Article › peer-review

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.

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AU - Jin-No, Takaaki

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