Coexistence of long range magnetic order and intervalent state of Eu in EuCu2(SixGe1-x)2: Evidence from neutron diffraction and spectroscopic studies

P. A. Alekseev; K. S. Nemkovski; D. P. Kozlenko; A. P. Menushenkov; A. A. Yaroslavtsev; A. V. Gribanov; E. S. Clementyev; C. Pantalei; B. Klobes; R. P. Hermann

doi:10.1134/S0021364014030023

Coexistence of long range magnetic order and intervalent state of Eu in EuCu₂(Si_xGe_1-x)₂: Evidence from neutron diffraction and spectroscopic studies

P. A. Alekseev, K. S. Nemkovski, D. P. Kozlenko, A. P. Menushenkov, A. A. Yaroslavtsev, A. V. Gribanov, E. S. Clementyev, C. Pantalei, B. Klobes, R. P. Hermann

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9 Scopus citations

Abstract

Experimental results of the X-ray absorption spectroscopy, Mössbauer spectroscopy (isomer shift) and neutron diffraction are presented for the series of EuCu₂(Si_xGe_1-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.

Original language	English
Pages (from-to)	164-168
Number of pages	5
Journal	JETP Letters
Volume	99
Issue number	3
DOIs	https://doi.org/10.1134/S0021364014030023
State	Published - 2014
Externally published	Yes

Funding

We are grateful to J. M. Mignot for deep interest and help in the work, to I.P. Sadikov, V.N. Lazukov, A.V. Kuznetsov, A.S. Ivanov, and S. Rols for stimulat ing discussions, to B. Beuneu for support during the neutron scattering experiment at LLB, to J. de Groot and H. Nair for their help in the magnetic test of the sample quality, to HASYLAB Program Committee for providing beam time. R.P.H. and B.K. acknowledge support from the Helmholtz Gemeinschaft Deutscher Forschungzentren for the Helmholtz University Young Investigator Group NG 407 “Lattice Dynamic in Emerging Functional Materials.” The work was partly supported by the Russian Foundation for Basic Research (project nos. 11 02 00121 and 14 02 00272).

Funders	Funder number
Helmholtz Gemeinschaft Deutscher Forschungzentren
Helmholtz University
Russian Foundation for Basic Research	14 02 00272, 11 02 00121

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Alekseev, P. A., Nemkovski, K. S., Kozlenko, D. P., Menushenkov, A. P., Yaroslavtsev, A. A., Gribanov, A. V., Clementyev, E. S., Pantalei, C., Klobes, B., & Hermann, R. P. (2014). Coexistence of long range magnetic order and intervalent state of Eu in EuCu₂(Si_xGe_1-x)₂: Evidence from neutron diffraction and spectroscopic studies. JETP Letters, 99(3), 164-168. https://doi.org/10.1134/S0021364014030023

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title = "Coexistence of long range magnetic order and intervalent state of Eu in EuCu2(SixGe1-x)2: Evidence from neutron diffraction and spectroscopic studies",

abstract = "Experimental results of the X-ray absorption spectroscopy, M{\"o}ssbauer spectroscopy (isomer shift) and neutron diffraction are presented for the series of EuCu2(SixGe1-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.",

author = "Alekseev, {P. A.} and Nemkovski, {K. S.} and Kozlenko, {D. P.} and Menushenkov, {A. P.} and Yaroslavtsev, {A. A.} and Gribanov, {A. V.} and Clementyev, {E. S.} and C. Pantalei and B. Klobes and Hermann, {R. P.}",

year = "2014",

doi = "10.1134/S0021364014030023",

language = "English",

volume = "99",

pages = "164--168",

journal = "JETP Letters",

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Alekseev, PA, Nemkovski, KS, Kozlenko, DP, Menushenkov, AP, Yaroslavtsev, AA, Gribanov, AV, Clementyev, ES, Pantalei, C, Klobes, B & Hermann, RP 2014, 'Coexistence of long range magnetic order and intervalent state of Eu in EuCu₂(Si_xGe_1-x)₂: Evidence from neutron diffraction and spectroscopic studies', JETP Letters, vol. 99, no. 3, pp. 164-168. https://doi.org/10.1134/S0021364014030023

TY - JOUR

T1 - Coexistence of long range magnetic order and intervalent state of Eu in EuCu2(SixGe1-x)2

T2 - Evidence from neutron diffraction and spectroscopic studies

AU - Alekseev, P. A.

AU - Nemkovski, K. S.

AU - Kozlenko, D. P.

AU - Menushenkov, A. P.

AU - Yaroslavtsev, A. A.

AU - Gribanov, A. V.

AU - Clementyev, E. S.

AU - Pantalei, C.

AU - Klobes, B.

AU - Hermann, R. P.

PY - 2014

Y1 - 2014

N2 - Experimental results of the X-ray absorption spectroscopy, Mössbauer spectroscopy (isomer shift) and neutron diffraction are presented for the series of EuCu2(SixGe1-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.

AB - Experimental results of the X-ray absorption spectroscopy, Mössbauer spectroscopy (isomer shift) and neutron diffraction are presented for the series of EuCu2(SixGe1-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.

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DO - 10.1134/S0021364014030023

M3 - Article

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SN - 0021-3640

VL - 99

SP - 164

EP - 168

JO - JETP Letters

JF - JETP Letters

IS - 3

ER -

Coexistence of long range magnetic order and intervalent state of Eu in EuCu₂(Si_xGe_1-x)₂: Evidence from neutron diffraction and spectroscopic studies

Abstract

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