Impurity effect in a novel spin-Peierls compound TiOBr

T. Sasaki; M. Yamazawa; K. Takahashi; T. Nagai; T. Asaka; Y. Matsui; J. Akimitsu

doi:10.1016/j.physb.2006.03.033

Impurity effect in a novel spin-Peierls compound TiOBr

T. Sasaki, M. Yamazawa, K. Takahashi, T. Nagai, T. Asaka, Y. Matsui, J. Akimitsu

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

Abstract

We have performed magnetic susceptibility and electron diffraction measurements on impurity effect in a novel spin-Peierls system TiOBr, i.e. Ti_{1 - x} Sc_x OBr. The impurity-induced antiferromagnetic long-range order found in Cu_{1 - x} Zn_x GeO₃ could not be observed in this system. A number of unpaired spins induced by the impurities can be explained by a simple model that one Sc impurity creates one S = frac(1, 2) spin up to the threshold concentration, x_c ∼ 0.025. The induced impurity suppresses the spin-Peierls transition temperature, T_{c 1} and the spin-Peierls phase disappears at x_t ∼ 0.028, although the incommensurate state still persists above x_t. Both values agree well with each other.

Original language	English
Pages (from-to)	1-4
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	383
Issue number	1
DOIs	https://doi.org/10.1016/j.physb.2006.03.033
Publication status	Published - Aug 15 2006
Externally published	Yes

Keywords

Electron diffraction
Impurity
Incommensurate
Spin-Peierls
TiOBr

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/j.physb.2006.03.033

Cite this

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title = "Impurity effect in a novel spin-Peierls compound TiOBr",

abstract = "We have performed magnetic susceptibility and electron diffraction measurements on impurity effect in a novel spin-Peierls system TiOBr, i.e. Ti1 - x Scx OBr. The impurity-induced antiferromagnetic long-range order found in Cu1 - x Znx GeO3 could not be observed in this system. A number of unpaired spins induced by the impurities can be explained by a simple model that one Sc impurity creates one S = frac(1, 2) spin up to the threshold concentration, xc ∼ 0.025. The induced impurity suppresses the spin-Peierls transition temperature, Tc 1 and the spin-Peierls phase disappears at xt ∼ 0.028, although the incommensurate state still persists above xt. Both values agree well with each other.",

keywords = "Electron diffraction, Impurity, Incommensurate, Spin-Peierls, TiOBr",

author = "T. Sasaki and M. Yamazawa and K. Takahashi and T. Nagai and T. Asaka and Y. Matsui and J. Akimitsu",

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T1 - Impurity effect in a novel spin-Peierls compound TiOBr

AU - Sasaki, T.

AU - Yamazawa, M.

AU - Takahashi, K.

AU - Nagai, T.

AU - Asaka, T.

AU - Matsui, Y.

AU - Akimitsu, J.

PY - 2006/8/15

Y1 - 2006/8/15

N2 - We have performed magnetic susceptibility and electron diffraction measurements on impurity effect in a novel spin-Peierls system TiOBr, i.e. Ti1 - x Scx OBr. The impurity-induced antiferromagnetic long-range order found in Cu1 - x Znx GeO3 could not be observed in this system. A number of unpaired spins induced by the impurities can be explained by a simple model that one Sc impurity creates one S = frac(1, 2) spin up to the threshold concentration, xc ∼ 0.025. The induced impurity suppresses the spin-Peierls transition temperature, Tc 1 and the spin-Peierls phase disappears at xt ∼ 0.028, although the incommensurate state still persists above xt. Both values agree well with each other.

AB - We have performed magnetic susceptibility and electron diffraction measurements on impurity effect in a novel spin-Peierls system TiOBr, i.e. Ti1 - x Scx OBr. The impurity-induced antiferromagnetic long-range order found in Cu1 - x Znx GeO3 could not be observed in this system. A number of unpaired spins induced by the impurities can be explained by a simple model that one Sc impurity creates one S = frac(1, 2) spin up to the threshold concentration, xc ∼ 0.025. The induced impurity suppresses the spin-Peierls transition temperature, Tc 1 and the spin-Peierls phase disappears at xt ∼ 0.028, although the incommensurate state still persists above xt. Both values agree well with each other.

KW - Electron diffraction

KW - Impurity

KW - Incommensurate

KW - Spin-Peierls

KW - TiOBr

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Impurity effect in a novel spin-Peierls compound TiOBr

Abstract

Keywords

ASJC Scopus subject areas

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