Quantum Hall effect in 2 dimensional GaInAs structure

Transport properties of GaAs / δ – Mn / GaAs / InxGa1-xAs / GaAs structure with Mn δ – layer, which is separated from InxGa1-xAs quantum well (QW) by 3 nm thick GaAs spacer was investigated. This structure with high mobility was characterized by X-ray difractometry and reflectometry. Transport and electrical properties of the structure were measured by using Pulsed Magnetic Field System (PMFS). During investigation of the Shubnikov – de Haas and the Hall effects the main parameters of QW structure such as cyclotron mass, Fermi level, g – factor, Dingle temperature and concentration of holes were estimated. Obtained results show high quality of the prepared structure. However, anomalous Hall effect at temperatures 2.09 K, 3 K, 4.2 K is not clearly observed. Attempts to identify magnetic moment were made. For this purpose the polarity of the filed was changed to the opposite at each shot. As a result hysteresis loop was not observed in the magnetic field dependences of the anomalous Hall resistivity.This can be attributed to the imperfection of the experimental setup.

Mr [James] O'Grady arrivant à Caxton Hall [membre du Parlement anglais et secrétaire de la National Federation of General Workers] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 56233

Grève des cheminots anglais, Mr Arthur Henderson [secrétaire du Labor party] quittant Caxton Hall : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 56234

[16/7/20, salle de l'Albert Hall de Londres] match [de boxe entre] Tommy Burns [et Joe] Beckett : [photographie de presse] / [Agence Rol]

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[16/7/20, salle de l'Albert Hall de Londres] match [de boxe entre] Tommy Burns [et Joe] Beckett : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 60156

[16/7/20, salle de l'Albert Hall de Londres] match [de boxe entre] Tommy Burns [et Joe] Beckett : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 60159

[16/7/20, salle de l'Albert Hall de Londres] match [de boxe entre] Tommy Burns [et Joe] Beckett : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 60157

[16/7/20, salle de l'Albert Hall de Londres] match [de boxe entre] Tommy Burns [et Joe] Beckett : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 60158

[16/7/20, salle de l'Albert Hall de Londres] match [de boxe entre] Tommy Burns [et Joe] Beckett : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 60160

[16/7/20, salle de l'Albert Hall de Londres] match [de boxe entre] Tommy Burns [et Joe] Beckett : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 60162

[16/7/20, salle de l'Albert Hall de Londres] match [de boxe entre] Tommy Burns [et Joe] Beckett : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 60161