Hyperfine Fields on Manganese in Iron-Manganese Alloys

Costa-Ribeiro, P.; Radhakrishna, P.; Thoulouze, D.; Ishikawa, Yoshikazu

doi:10.1051/jphyscol:1971121

Cited by 1 publication

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“…The standard graphical method of linear extrapolation of the drifts leads to a much larger scatter, in the same experimental conditions, as may be seen in the results obtained for the Au-Co [2] system. Thanks to this method, the terms in 1/T4, 1/T6... of the nuclear Schottky anomalies have been observed for the first time in dilute alloys containing 3d transition impurities [1].…”

Section: Error Due To the Response Time Of Thementioning

confidence: 70%

“…In a typical experiment 3 to 7 runs are made below 100 mK and the scatter of the experimental points is a good estimation of the random errors. With the method described in this paper, the scatter has been reduced to a few percent for the different runs, as may be seen in the measurements of the Au-Co-Fe [2] and Pt-Co [1] ] systems.…”

Section: Error Due To the Response Time Of Thementioning

confidence: 99%

“…Introduction. -We present a system of acquisition and treatment of data which was developed for measurements of specific heats in the range from 20 mK to 100 mK, and was used in the study of the nuclear specific heat of dilute alloys Pt-Co [1], Au-Co-Fe [2] and Cu-Mn).…”

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confidence: 99%

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A method for the acquisition and the treatment of specific heat data-nuclear specific heat of Cu-Mn

Costa-Ribeiro¹,

Picot²,

Souletie³

et al. 1974

Rev. Phys. Appl. (Paris)

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2014 Nous présentons une méthode de traitement des résultats de chaleur spécifique applicable aux très basses températures où les temps de réponses introduiraient de grandes erreurs dans la méthode graphique habituellement utilisée avec la technique adiabatique. Cette méthode d'acquisition et de traitement des données a été automatisée. La précision acquise nous permet de séparer les contributions respectives de l'impureté et de la matrice dans la chaleur spécifique nucléaire d'un alliage CuMn entre 20 mK et 100 mK. On trouve 290 ± 10 kOe comme valeur du champ hyperfin sur les noyaux de Mn.Abstract. 2014 A method is presented for the treatment of specific heat data at very low temperatures where long response times would introduce large errors in the standard graphical method used with the adiabatic technique : use is made of the knowledge of the time evolution of the temperature T and of its time derivative T. This method was adapted to an automatic system of acquisition and treatment of the data. The gain in accuracy enables us to separate the impurity and the host contribution to the nuclear specific heat of Cu-Mn between 20 mK and 100 mK. The hyperfine field is found to be 290 ± 10 kOe on the Mn nuclei.

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Section: Error Due To the Response Time Of Thementioning

confidence: 70%

Section: Error Due To the Response Time Of Thementioning

confidence: 99%