Magnetic Structure and Quadrupolar Order Parameter Driven by Geometrical Frustration Effect in NdB₄
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説明
Neutron diffraction experiments have been carried out to characterize the magnetic structures and order parameters in an intermediate phase of NdB4 showing the successive phase transitions at T0 = 17.2 K, TN1 = 7.0 K, and TN2 = 4.8 K. We have revealed the antiferromagnetic ordering with the propagation vectors \(\textbf{q}_{0} = (0,0,0)\), q0 and \(\textbf{q}_{\text{s}1} = (\delta ,\delta ,0.4)\) (δ ∼ 0.14), and q0 and \(\textbf{q}_{\text{s}2} = (0.2,0,0.4)\) in phase II (TN1 < T < T0), phase III (TN2 < T < TN1), and phase IV (T < TN2), respectively. The observed patterns in phase II are successfully explained by postulating a coplanar structure with static magnetic moments in the tetragonal ab-plane. We have found that the magnetic structure in phase II can be uniquely determined to be a linear combination of antiferromagnetic “all-in/all-out”-type (Γ4) and “vortex”-type (Γ2) structures, consisting of a Γ4 main component (77%) with a small amplitude of Γ2 (23%). We propose that the quadrupolar interactio...
収録刊行物
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 86 (4), 044705-, 2017-04
Tokyo : Physical Society of Japan
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詳細情報 詳細情報について
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- CRID
- 1521699230324758144
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- NII論文ID
- 210000134340
- 40021162618
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- NII書誌ID
- AA00704814
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- ISSN
- 00319015
- 13474073
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- NDL書誌ID
- 028108374
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- 本文言語コード
- en
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- NDL 雑誌分類
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- ZM35(科学技術--物理学)
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