Ferromagnetism in Bi2Se3: Mn epitaxial layers - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2013

Ferromagnetism in Bi2Se3: Mn epitaxial layers

J. L. Cantin
  • Fonction : Auteur
D. M. Zhang
  • Fonction : Auteur
A. Richardella
  • Fonction : Auteur
D. W. Rench
  • Fonction : Auteur
N. Samarth
  • Fonction : Auteur
J. A. Borchers
  • Fonction : Auteur

Résumé

The magnetism in similar to 1 at% Mn-doped nanometric Bi2Se3 epitaxial layers has been studied by ferromagnetic resonance (FMR), magnetometry, and polarized neutron reflectivity (PNR) measurements. The FMR results reveal the formation of an intrinsic homogeneous FM bulk phase, as confirmed by the PNR measurements. Its critical temperature is low: T-c approximate to 6 K; no surface magnetic phase is detected above this temperature. The FMR measurements at T = 4.2 K show a single uniform mode spectrum with a strong uniaxial in-plane/out-of-plane symmetry. The uniaxial anisotropy field at T = 4 K is H-a similar to - 2500 Oe, corresponding to a uniaxial anisotropy constant of -9 x 10(3) erg/cm(3). The easy axis of magnetization is oriented in the film plane for temperatures between 4 K and T-c. Conduction electron-mediated FM in this (very) diluted magnetic semiconductor is considered as the most probable origin of the FM phase formation.
Fichier non déposé

Dates et versions

hal-01237462 , version 1 (03-12-2015)

Identifiants

Citer

H. J. Von Bardeleben, J. L. Cantin, D. M. Zhang, A. Richardella, D. W. Rench, et al.. Ferromagnetism in Bi2Se3: Mn epitaxial layers. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2013, 88 (7), pp.075149. ⟨10.1103/PhysRevB.88.075149⟩. ⟨hal-01237462⟩
33 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More