Coexistence of long range magnetic order and intervalent state of Eu in EuCu2(Si x Ge1-x )2: Evidence from neutron diffraction and spectroscopic studies

被引：7
|
作者：
Alekseev, P. A. [1 ,2 ]
Nemkovski, K. S. [3 ]
Kozlenko, D. P. [4 ]
Menushenkov, A. P. [2 ]
Yaroslavtsev, A. A. [2 ]
Gribanov, A. V. [5 ]
Clementyev, E. S. [1 ,2 ,6 ]
Pantalei, C. [7 ]
Klobes, B. [8 ,9 ]
Hermann, R. P. [8 ,9 ,10 ]
机构：
[1] Natl Res Ctr Kurchatov Inst, Moscow 123182, Russia
[2] Natl Res Nucl Univ MEPhI, Moscow 115409, Russia
[3] Forschungszentrum Julich, Outstn MLZ, JCNS, D-85747 Garching, Germany
[4] Joint Inst Nucl Res, Frank Lab Neutron Phys, Dubna 191980, Moscow Region, Russia
[5] Moscow MV Lomonosov State Univ, Fac Chem, Moscow 119991, Russia
[6] Russian Acad Sci, Inst Nucl Res, Troitsk 142190, Moscow Region, Russia
[7] CEA Saclay, CEA, CNRS UMR12, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France
[8] Forschungszentrum Julich, JCNS, D-52425 Julich, Germany
[9] Forschungszentrum Julich, JARA FIT, PGI, D-52425 Julich, Germany
[10] Univ Liege, Fac Sci, B-4000 Liege, Belgium
来源：
JETP LETTERS | 2014年 / 99卷 / 03期
基金：
俄罗斯基础研究基金会;
关键词：
Neutron Diffraction; JETP Letter; Isomer Shift; Neutron Diffraction Pattern; Magnetic Phase Diagram;
D O I：
10.1134/S0021364014030023
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Experimental results of the X-ray absorption spectroscopy, Mossbauer spectroscopy (isomer shift) and neutron diffraction are presented for the series of EuCu2(Si (x) Ge1 - x )(2) polycrystalline samples (0 < x < 0.75). Homogeneous intermediate valence state is established for Eu ions as well as long range magnetically ordered state at the temperatures below 10-15 K. Observation of the ordered magnetic moments at Eu site gives rise to the experimental statement for the coexistence of valence fluctuations and long range magnetic order takes place in the wide range of Ge concentrations for this substance.
引用
收藏
页码：164 / 168
页数：5
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