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ID 19292
file
creator
Echizen, Yuji
Jung, Myoung Hwa
Sakakibara, Toshiro
Terashima, Taichi
Terakura, Chieko
Pfleiderer, Christian
Uhlarz, Marc
Löhneysen, Hilbert Von
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.
journal title
Physical Review B - Condensed Matter and Materials Physics
volume
Volume 67
issue
Issue 14
start page
144408-1
end page
144408-6
date of issued
2003-04-10
publisher
American Physical Society
issn
1098-0121
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2003 The American Physical Society.
relation url
department
Graduate School of Advanced Sciences of Matter