Spin-1/2 quantum antiferromagnetic chains with tunable superexchange interactions found in BaCu2(Si1-xGex)2O7

T. Yamada; Z. Hiroi; M. Takano

doi:10.1006/jssc.2000.8968

Spin-1/2 quantum antiferromagnetic chains with tunable superexchange interactions found in BaCu₂(Si_1-xGe_x)₂O₇

T. Yamada, Z. Hiroi, M. Takano

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

37 Citations (Scopus)

Abstract

Synthesis, structure, and magnetic properties of a novel one-dimensional spin-1/2 quantum antiferromagnetic (AF) system BaCu₂(Si_1-xGe_x)₂O₇ (0≤x≤1) are reported. Contained in this system are corrugated CuO chains made of corner-sharing CuO₄ squares with the dominant exchange interaction changing almost linearly between 290 K (x=0) and 580 K (x=1). Anomalies in susceptibility and specific heat, indicative of the occurrence of a long-range AF ordering, are observed at 8.9 K (x=0) and 8.6 K (x=1). A rich magnetic phase diagram results from this strong composition dependence combined with the switching of the interchain interaction changing from ferromagnetic (x=0) to AF (x=1).

Original language	English
Pages (from-to)	101-109
Number of pages	9
Journal	Journal of Solid State Chemistry
Volume	156
Issue number	1
DOIs	https://doi.org/10.1006/jssc.2000.8968
Publication status	Published - 2001
Externally published	Yes

Keywords

BaCu(SiGe)O
Corner-sharing CuO squares
Dzyaloshinsky - Moriya interaction
Heisenberg antiferromagnetic chains
Superexchange interactions

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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@article{7a2205d92f3042728e9ce8d6fbb56efe,

title = "Spin-1/2 quantum antiferromagnetic chains with tunable superexchange interactions found in BaCu2(Si1-xGex)2O7",

abstract = "Synthesis, structure, and magnetic properties of a novel one-dimensional spin-1/2 quantum antiferromagnetic (AF) system BaCu2(Si1-xGex)2O7 (0≤x≤1) are reported. Contained in this system are corrugated CuO chains made of corner-sharing CuO4 squares with the dominant exchange interaction changing almost linearly between 290 K (x=0) and 580 K (x=1). Anomalies in susceptibility and specific heat, indicative of the occurrence of a long-range AF ordering, are observed at 8.9 K (x=0) and 8.6 K (x=1). A rich magnetic phase diagram results from this strong composition dependence combined with the switching of the interchain interaction changing from ferromagnetic (x=0) to AF (x=1).",

keywords = "BaCu(SiGe)O, Corner-sharing CuO squares, Dzyaloshinsky - Moriya interaction, Heisenberg antiferromagnetic chains, Superexchange interactions",

author = "T. Yamada and Z. Hiroi and M. Takano",

note = "Funding Information: This work was supported by CREST (Core Research for Evolutional Science and Technology) of the Japan Science and Technology Corporation and by a Grant-in-Aid for Scienti{"}c Research (C) of the Ministry of Education, Science, Sports and Culture.",

year = "2001",

doi = "10.1006/jssc.2000.8968",

language = "English",

volume = "156",

pages = "101--109",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

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AU - Yamada, T.

AU - Hiroi, Z.

AU - Takano, M.

N1 - Funding Information: This work was supported by CREST (Core Research for Evolutional Science and Technology) of the Japan Science and Technology Corporation and by a Grant-in-Aid for Scienti"c Research (C) of the Ministry of Education, Science, Sports and Culture.

PY - 2001

Y1 - 2001

N2 - Synthesis, structure, and magnetic properties of a novel one-dimensional spin-1/2 quantum antiferromagnetic (AF) system BaCu2(Si1-xGex)2O7 (0≤x≤1) are reported. Contained in this system are corrugated CuO chains made of corner-sharing CuO4 squares with the dominant exchange interaction changing almost linearly between 290 K (x=0) and 580 K (x=1). Anomalies in susceptibility and specific heat, indicative of the occurrence of a long-range AF ordering, are observed at 8.9 K (x=0) and 8.6 K (x=1). A rich magnetic phase diagram results from this strong composition dependence combined with the switching of the interchain interaction changing from ferromagnetic (x=0) to AF (x=1).

AB - Synthesis, structure, and magnetic properties of a novel one-dimensional spin-1/2 quantum antiferromagnetic (AF) system BaCu2(Si1-xGex)2O7 (0≤x≤1) are reported. Contained in this system are corrugated CuO chains made of corner-sharing CuO4 squares with the dominant exchange interaction changing almost linearly between 290 K (x=0) and 580 K (x=1). Anomalies in susceptibility and specific heat, indicative of the occurrence of a long-range AF ordering, are observed at 8.9 K (x=0) and 8.6 K (x=1). A rich magnetic phase diagram results from this strong composition dependence combined with the switching of the interchain interaction changing from ferromagnetic (x=0) to AF (x=1).

KW - BaCu(SiGe)O

KW - Corner-sharing CuO squares

KW - Dzyaloshinsky - Moriya interaction

KW - Heisenberg antiferromagnetic chains

KW - Superexchange interactions

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