Details

Autor(en) / Beteiligte

• Kawakami, R. K.
• Johnston-Halperin, E.
• Chen, L. F.
• Hanson, M.
• Guébels, N.
• Speck, J. S.
• Gossard, A. C.
• Awschalom, D. D.

Titel

(Ga,Mn)As as a digital ferromagnetic heterostructure

Ist Teil von

• Applied physics letters, 2000-10, Vol.77 (15), p.2379-2381

Erscheinungsjahr

2000

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• (Ga,Mn)As digital ferromagnetic heterostructures are grown by incorporating submonolayer planes of MnAs into GaAs using molecular beam epitaxy. Structural and magnetic measurements indicate single-crystalline superlattice structure and ferromagnetic order with Curie temperatures (TC) up to 50 K. By varying the spacing between neighboring Mn layers, we observe that TC initially decreases with increasing spacer thickness, followed by a regime with weak dependence on the spacer thickness. The persistence of ferromagnetism for interlayer spacings of at least 200 ML (∼560 Å) suggests that the individual Mn layers are ferromagnetic.