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(Ga,Mn)As as a digital ferromagnetic heterostructure

Appl. Phys. Lett. 77, 2379 (2000); doi:10.1063/1.1316775

Issue Date: 9 October 2000 | See: Erratum

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R. K. Kawakami, E. Johnston-Halperin, L. F. Chen, M. Hanson, N. Guébels, J. S. Speck, A. C. Gossard, and D. D. Awschalom
Center for Spintronics and Quantum Computation, University of California, Santa Barbara, California 93106
(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. ©2000 American Institute of Physics.
History: Received 21 June 2000; accepted 16 August 2000
Permalink: http://link.aip.org/link/?APPLAB/77/2379/1
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ERRATUM

  1. Erratum: "(Ga,Mn)As as a digital ferromagnetic heterostructure" [Appl. Phys. Lett. 77, 2379 (2000)]
    R. K. Kawakami et al.
    Appl. Phys. Lett. 77, 3665 (2000)

KEYWORDS and PACS

Keywords
PACS
  • 75.70.Cn
    Magnetic properties and materials Magnetic films and multilayers Interfacial magnetic properties (multilayers, magnetic quantum wells, superlattices, magnetic heterostructures)
  • 75.50.Dd
    Magnetic properties and materials Studies of specific magnetic materials Nonmetallic ferromagnetic materials
  • 68.65.+g
    Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties) Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties
  • 75.50.Pp
    Magnetic properties and materials Studies of specific magnetic materials Magnetic semiconductors
  • 81.15.Hi
    Materials science Methods of deposition of films and coatings; film growth and epitaxy Molecular, atomic, ion, and chemical beam epitaxy
  • 68.35.Ct
    Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties) Solid surfaces and solid–solid interfaces Interface structure and roughness
  • 75.30.Kz
    Magnetic properties and materials Intrinsic properties of magnetically ordered materials Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
  • YEAR: 2000

PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (15)
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