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|Type:||Artigo de periódico|
|Title:||Magnetic Properties Of Frustrated Y-doped Gdincu4|
|Abstract:||We report temperature dependent magnetic susceptibility and electron spin resonance (ESR) measurements on single crystals of the frustrated antiferromagnet Gd1 - x Yx InCu4 (x = 0, 0.01, 0.05 and 0.1). The magnetic susceptibility data revealed, as expected, a decreasing in the antiferromagnetic ordering temperature as function of the Y-concentration, while the high-T Curie-Weiss temperatures remain nearly unaffect by the doping. For T ≳ 100 K, a single Dysonian Gd3 + ESR line with a nearly temperature independent g ∼ 1.989 (8) is observed, and its linewidth follows a Korringa-like (Δ H / Δ T ∼ 0.75 (5) Oe / K) behavior as a function of temperature. Below T ≈ 100 K both the ESR g-value and linewidth are affected by the presence of strong short-range magnetic correlation in the paramagnetic phase well above TN, consistently with the frustrated character of this compound. The role of chemical disorder and dilution effects induced by Y-doping in the properties of this highly frustrated material is discussed. © 2007 Elsevier B.V. All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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