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

39 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

Access to Document

10.1006/jssc.2000.8968

Cite this

@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",

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T1 - Spin-1/2 quantum antiferromagnetic chains with tunable superexchange interactions found in BaCu2(Si1-xGex)2O7

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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