Gradual development of Γ5g antiferromagnetic moment in the giant negative thermal expansion material Mn3Cu1-x Ge x N (x∼0.5)

K. Kodama, S. Iikubo, K. Takenaka, M. Takigawa, H. Takagi, S. Shamoto

研究成果: ジャーナルへの寄稿学術誌査読

42 被引用数 (Scopus)

抄録

The antiperovskite compound Mn3 Cu1-x Gex N with x∼0.5 has a giant negative thermal expansion coefficient due to the magnetovolume effect near room temperature. Competition between the Γ5g and Γ4g antiferromagnetic structures around the magnetic ordering temperature could be the driving force for such a phenomenon. In order to examine this possibility, we performed neutron-diffraction experiments on Mn3Cu0.5Ge0.5N and N 14 nuclear magnetic resonance experiments on Mn3 Cu0.6 Ge0.4 N. As a reference material, we also investigated Mn3 NiN, whose spin structure is represented by a linear combination of the Γ5g and Γ4g antiferromagnetic components. We conclude that in Mn3 Cu 1-x Gex N (x∼0.5), the Γ4g antiferromagnetic component is nearly absent and the competition between the Γ5g and Γ4g antiferromagnetic structures is irrelevant to the giant negative thermal expansion coefficient. The Γ5g antiferromagnetic ordered moment gradually develops with decreasing temperature. This provides a thorough justification for the analysis presented in the previous letter.

本文言語英語
論文番号224419
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
81
22
DOI
出版ステータス出版済み - 6月 14 2010
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

フィンガープリント

「Gradual development of Γ5g antiferromagnetic moment in the giant negative thermal expansion material Mn3Cu1-x Ge x N (x∼0.5)」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル