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Local versus Bulk Properties of CeAg_{2}Sn_{2}

100%

Görlich E.

Acta Physica Polonica A

1994

vol. 85

issue 2

253-257

Results of electrical resistivity and ^{119}Sn Mössbauer effect measurements for two samples of CeAg_{2}Sn_{2} compound are presented. A sharp drop in resistance of an annealed sample at 3.5 K might have suggested a superconducting transition while for the as-melted specimen only a modest change in ρ vs. T slope is observed at this temperature. Resonance γ-absorption reveals differences and similarities on a microscopic scale between the two samples. The occurrence of certain regions of a long-range magnetic ordering within the CeAg_{2}Sn_{2} phase is unambiguously demonstrated by the presence of hyperfine splitting. Temperature variation of the hyperfine field follows a molecular field spin-½ function.

Hyperfine Interactions and Spin Correlations in ErT_{2}Sn_{2} (T = Ni, Cu) Phases

63%

Görlich E., Kmieć R.

Acta Physica Polonica A

1994

vol. 85

issue 3

627-632

The present work reports on the electrical resistivity measurements and ^{119}Sn Mößbauer effect investigations of the hyperfine interactions in novel ternary compounds ErNi_{2}Sn_{2} and ErCu_{2}Sn_{2}. The attention was focused on the temperature region of the magnetic ordering transitions, i.e. at T_{N} = 5 K and 3.5 K, respectively. Er^{3+} spin correlations in ErNi_{2}Sn_{2} are discussed in terms of their influence on resonant γ-absorption.

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2 Acta Physica Polonica A

2 1994

2 Görlich E.

1 Kmieć R.

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Local versus Bulk Properties of CeAg_{2}Sn_{2}

Hyperfine Interactions and Spin Correlations in ErT_{2}Sn_{2} (T = Ni, Cu) Phases