Neutron-diffraction study of CePtSn

被引：0

作者：

B. Janoušová

P. Svoboda

V. Sechovský

K. Prokeš

T. Komatsubara

H. Nakotte

S. Chang

B. Ouladdiaf

I. Císařová

机构：

[1] Charles University,

[2] Dept. of Electronic Structures,undefined

[3] 121 16 Prague 2,undefined

[4] The Czech Republic,undefined

[5] Hahn-Meitner-Institute,undefined

[6] SF-2,undefined

[7] 14109 Berlin,undefined

[8] Germany,undefined

[9] Department of Physics,undefined

[10] Graduate School of Science,undefined

[11] Tohoku University,undefined

[12] Sendai 980-8578,undefined

[13] Japan,undefined

[14] Physics Department,undefined

[15] MSC3D,undefined

[16] New Mexico State University,undefined

[17] Las Cruces NM 88003,undefined

[18] USA,undefined

[19] Institute Laue Langevin,undefined

[20] BP156,undefined

[21] 38042 Grenoble Cedex 9,undefined

[22] France,undefined

[23] Charles University,undefined

[24] Dept. of Inorganic Chemistry,undefined

[25] 128 40 Prague 2,undefined

[26] The Czech Republic,undefined

来源：

Applied Physics A | 2002年 / 74卷

关键词：

PACS: 75.25.+z; 75.30.Mb;

D O I：

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学科分类号：

摘要：

We report a neutron- and X-ray-diffraction study of single crystals of CePtSn. As for the crystallographic structure, we have determined that the space group is centrosymmetric Pnma, contrary to the previously reported non-centrosymmetric ε-TiNiSi-type structure. At low temperatures two magnetic phase transitions have been observed at TN≈7.5 K and TM≈5.2 K. Our neutron-diffraction data support the previously proposed ‘spin-slip’ magnetic structures with the basic propagation vector q=(0,1/2,0) and sample-dependent spin-slips resulting in various observed incommensurate propagation vectors. Two separately prepared CePtSn single crystals were studied. In one of them we have found coexistence of the propagation vectors q1=(0,0.470,0) and q2=(0,0.422,0) below TM, while only q2 exists between TN and TM. In the other sample the propagation vector q2 also exists for the whole range T<TN and coexists with q1 below TM, but the intensity of q2-related reflections is strongly suppressed with decreasing temperature.

引用

页码：s731 / s733