Mixed valency of europium in magnetically ordered EuFe4Al8

I. Felner; I. Nowik

doi:10.1016/0038-1098(78)90329-0

Mixed valency of europium in magnetically ordered EuFe₄Al₈

I. Felner^*, I. Nowik

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

X-ray, susceptibility and Mössbauer effect (ME) studies of EuFe₄Al₈ and EuFe_3.5Cu_0.5Al₈ were performed. The susceptibility and the ⁵⁷FeME studies indicate an antiferromagnetic phase transition of the iron sublattic at 140 K. The ¹⁵¹EuME studies show a temperature dependent isomer shift typical of a mixed valent state with an interconfiguration excitation energy (ICE) of 1100 K and width 400 K. At temperatures below 140 K also the Eu ions become magnetically ordered. In EuFe_3.5Cu_0.5Al₈ the europium ICE is strongly dependent on local environment.

Original language	English
Pages (from-to)	67-70
Number of pages	4
Journal	Solid State Communications
Volume	28
Issue number	1
DOIs	https://doi.org/10.1016/0038-1098(78)90329-0
State	Published - Oct 1978

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title = "Mixed valency of europium in magnetically ordered EuFe4Al8",

abstract = "X-ray, susceptibility and M{\"o}ssbauer effect (ME) studies of EuFe4Al8 and EuFe3.5Cu0.5Al8 were performed. The susceptibility and the 57FeME studies indicate an antiferromagnetic phase transition of the iron sublattic at 140 K. The 151EuME studies show a temperature dependent isomer shift typical of a mixed valent state with an interconfiguration excitation energy (ICE) of 1100 K and width 400 K. At temperatures below 140 K also the Eu ions become magnetically ordered. In EuFe3.5Cu0.5Al8 the europium ICE is strongly dependent on local environment.",

author = "I. Felner and I. Nowik",

year = "1978",

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doi = "10.1016/0038-1098(78)90329-0",

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N2 - X-ray, susceptibility and Mössbauer effect (ME) studies of EuFe4Al8 and EuFe3.5Cu0.5Al8 were performed. The susceptibility and the 57FeME studies indicate an antiferromagnetic phase transition of the iron sublattic at 140 K. The 151EuME studies show a temperature dependent isomer shift typical of a mixed valent state with an interconfiguration excitation energy (ICE) of 1100 K and width 400 K. At temperatures below 140 K also the Eu ions become magnetically ordered. In EuFe3.5Cu0.5Al8 the europium ICE is strongly dependent on local environment.

AB - X-ray, susceptibility and Mössbauer effect (ME) studies of EuFe4Al8 and EuFe3.5Cu0.5Al8 were performed. The susceptibility and the 57FeME studies indicate an antiferromagnetic phase transition of the iron sublattic at 140 K. The 151EuME studies show a temperature dependent isomer shift typical of a mixed valent state with an interconfiguration excitation energy (ICE) of 1100 K and width 400 K. At temperatures below 140 K also the Eu ions become magnetically ordered. In EuFe3.5Cu0.5Al8 the europium ICE is strongly dependent on local environment.

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Mixed valency of europium in magnetically ordered EuFe₄Al₈

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