Field-induced magnetic transition in the heavy-fermion antiferromagnet Ce7Ni3
Use this link to cite this item : https://ir.lib.hiroshima-u.ac.jp/00019292
ID | 19292 |
file | |
creator |
Echizen, Yuji
Jung, Myoung Hwa
Sakakibara, Toshiro
Terashima, Taichi
Terakura, Chieko
Pfleiderer, Christian
Uhlarz, Marc
Löhneysen, Hilbert Von
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abstract | We present a detailed study of the field (B) - temperature (T) phase diagram of the heavy-fermion antiferromagnet Ce7Ni3 that crystallizes in the hexagonal Th7Fe3-type structure with three nonequivalent Ce sites (CeI, CeII, and CeIII). This compound undergoes two magnetic transitions at TN1 = 1.9 K and TN2 0.7 K in zero field. Below TN1, an incommensurate spin density wave (SDW) develops, and below TN2 a commensurate SDW appears independently. By applying fields along the c axis, both TN1 and TN2, are suppressed and vanish at 0.3 T. For B∥c > 0.7 T, however, another magnetic phase appears below 0.5 K, which was found by magnetoresistance, specific heat, and magnetization measurements. The separation of the field induced phase from the SDW phase is attributed to large spin fluctuations of CeIII, which originate from a geometrical frustration in the quasiregular tetrahedron made of CeI and CeIII.
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journal title |
Physical Review B - Condensed Matter and Materials Physics
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volume | Volume 67
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issue | Issue 14
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start page | 144408-1
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end page | 144408-6
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date of issued | 2003-04-10
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publisher | American Physical Society
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issn | 1098-0121
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ncid | |
publisher doi | |
language |
eng
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nii type |
Journal Article
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HU type |
Journal Articles
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DCMI type | text
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format | application/pdf
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text version | publisher
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rights | Copyright (c) 2003 The American Physical Society.
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relation url | |
department |
Graduate School of Advanced Sciences of Matter
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