Critical scattering around the antiferromagnetic transition in holmium

Autor: R. L. Singh, S. B. Woods
Rok vydání: 1981
Předmět:
Zdroj: Journal of Low Temperature Physics. 43:153-163
ISSN: 1573-7357
0022-2291
DOI: 10.1007/bf00118628
Popis: Detailed analyses of the electrical resistance of holmium near the antiferromagnetic transition T N in magnetic fields up to 71 kOe are reported. The critical exponent in the expression for the reduced resistance % MathType!MTEF!2!1!+-% feaafeart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr% 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqaqpepeea0xe9qqVa0l% b9peea0lb9sq-JfrVkFHe9peea0dXdarVe0Fb9pgea0xa9pue9Fve9% Ffc8meGabaqaciGacaGaaeqabaWaaeaaeaaakeaaieGacaWFYbacba% Gaa4hkaiaa-rhacaGFPaGaeyypa0Jaa8NCamaaBaaajeaqbaGaa4hm% aaWcbeaakiabgUcaRiaa-jeacaWF0bGaey4kaSIaa8xqamaaBaaale% aacqGHRaWkaeqaaOGaa8hDamaaCaaaleqabaGaa4xmaiabgkHiTGGa% aiab9f7aHbaakiabgUcaRiaa-feadaWgaaWcbaGaaeiiaiabgkHiTa% qabaGccaGFOaGaeyOeI0Iaa8hDaiaa+LcadaahaaWcbeqaaiaa+fda% cqGHsislcqqFXoqyaaaaaa!51B4!\[r(t) = r_0 + Bt + A_ + t^{1 - \alpha } + A_{{\rm{ }} - } ( - t)^{1 - \alpha } \] for % MathType!MTEF!2!1!+-% feaafeart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr% 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqaqpepeea0xe9qqVa0l% b9peea0lb9sq-JfrVkFHe9peea0dXdarVe0Fb9pgea0xa9pue9Fve9% Ffc8meGabaqaciGacaGaaeqabaWaaeaaeaaakeaacqGHsislcaaIWa% GaaiOlaiaaigdacqGHKjYOcaWG0bGaeyizImQaaGymaiaac6cacaaI% 0aGaaeiiaGqaaiaa-HhacaWFGaGaa8xmaiaa-bdadaahaaWcbeqaai% abgkHiTiaaikdaaaaaaa!469D!\[ - 0.1 \le t \le 1.4{\rm{ }}x 10^{ - 2} \], where % MathType!MTEF!2!1!+-% feaafeart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr% 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqaqpepeea0xe9qqVa0l% b9peea0lb9sq-JfrVkFHe9peea0dXdarVe0Fb9pgea0xa9pue9Fve9% Ffc8meGabaqaciGacaGaaeqabaWaaeaaeaaakeaacaWG0bGaeyypa0% JaaiikaiaadsfacqGHsislcaWGubWaaSbaaKqaGfaaieaacaWFobaa% leqaaOGaaiykaiaac+cacaWGubWaaSbaaKqaGfaacaWFobaaleqaaa% aa!41DC!\[t = (T - T_N )/T_N \], is λ ≈ −0.27 for the c-axis crystal and is approximately field independent. The critical temperature decreases approximately linearly with increasing field. For T < T N, the magnetoresistance exhibits a maximum and is negative at higher fields. These results have been interpreted in terms of field-induced changes in the spiral-spin structure and the estimated critical field is found to be in good agreement with published data.
Databáze: OpenAIRE
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