Mechanisms of exchange interactions between carriers and Mn or Eu spins in lead chalcogenides

Dietl, T.; Śliwa, Cezary; Bauer, G.; Pascher, H.

doi:10.1103/physrevb.49.2230

Cited by 61 publications

(42 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The small magnitude of the sp-f exchange integrals in IV-VI semiconductors is also confirmed by the results of the early electron paramagnetic resonance (EPR) work by Sperlich and Urban [17]. The current understanding of the physical origin of this coupling is discussed by Dieti et al [18].…”

Section: Iv-vi Semiconductors With Eu and With Ybsupporting

confidence: 54%

IV-VI Semimagnetic Semiconductors with Rare Earth Ions

Story

1997

Acta Phys. Pol. A

View full text Add to dashboard Cite

The electronic and magnetic properties as well as the applications of IV-VI semiconductors with rare earth ions of Eu and Yb are briefly discussed. The detailed analysis is presented of the recent experimental investigations of the magnetic and transport properties of IV-VI semimagnetic crystals with Gd. It concerns, in particular, the effect of Fermi level position controlled f-f exchange interaction between Gd ions in Sn1-xGdxΤe.

show abstract

Section: Iv-vi Semiconductors With Eu and With Ybsupporting

confidence: 54%

IV-VI Semimagnetic Semiconductors with Rare Earth Ions

Story

1997

Acta Phys. Pol. A

View full text Add to dashboard Cite

show abstract

“…The one-dimensional model is not suited to represent quantitatively any real three-dimensional superlattice, still we chose the parameters as to reproduce the energy gaps and the width of the bands of PbTe and EuTe (en = 0, em, = 1.8 eV, eA = -0.2 eV, α = 1.5 eV). Also the values J = 0.35 eV and JA = 0.08 eV are chosen to be of the order expected for the direct and kinetic exchange for f-shell atoms in PbTe [6]. The essential features of the obtained results are as follows:…”

Section: Institute Of Physics Polish Academy Of Sciencesmentioning

confidence: 90%

Correlations in Magnetic-Nonmagnetic Semiconductor Superlattices - Simple Model

Blinowski

Kacman

1997

Acta Phys. Pol. A

View full text Add to dashboard Cite

The magnetic interactions in superlattices formed by alternating 1ay-ers of magnetic and nonmagnetic semiconductors with common anions were studied theoretically. Within a one-dimensional tight-binding model by minimising the total electronic energy we show the existence of an efficient long range mechanism of magnetic correlations between the neighbouring magnetic 1ayers in such superlattices. The cases of magnetic ions in the barriers (e.g., EuTe/PbTe) and in the wells, with the order within the magnetic 1ay-ers being either ferromagnetic or antiferromagnetic, have been considered and compared with the paramagnetic case. In the case of antiferromagnetic ordering within magnetic 1ayers we have found that for even and odd numbers of magnetic monolayers different magnetic superlattices are energetically favourable.PACS numbers: 75.70. Ak, 75.25.+z The magnetic correlations between the ferromagnetic metallic layers separated by nonmagnetic metals and insulators have been widely studied for the last ten years, both experimentally and theoretically. In the case of the metallic spacers several models have been proposed to explain the correlation mechanism: the RKKY model, the free electron model, the tight-binding model with spin dependent potential steps, etc. For the insulating spacers the model of electron tunnelling has been advocated (for references see, e.g., [1]). However, it has been shown by Bruno [1] that there is a common feature of all these models, which is the spin dependent change of the density of states resulting from the quantum interference of the free electron waves.Recently, the magnetic correlations were also discovered in semiconductor superlattices -the nentron diffraction studies of ΕuTe/PbTe superlattices showed (719)

show abstract

“…The investigations of magnetic and magnetooptical properties of Mn-based IV-VI semimagnetic semiconductors provided a solid evidence for the existence of the sp-d exchange interaction between the system of local magnetic moments of Mn ions and the system of free carriers with the exchange integral J s d of the order of 50-100 meV [6][7][14][15].…”

Section: Mn-based Iv-vi Semimagnetic Semiconductorsmentioning

confidence: 99%

Correlations between Electronic and Magnetic Properties in Semimagnetic Semiconductors

Story

1997

Acta Phys. Pol. A

View full text Add to dashboard Cite

Mechanisms of exchange interactions between carriers and Mn or Eu spins in lead chalcogenides

Cited by 61 publications

References 27 publications

IV-VI Semimagnetic Semiconductors with Rare Earth Ions

IV-VI Semimagnetic Semiconductors with Rare Earth Ions

Correlations in Magnetic-Nonmagnetic Semiconductor Superlattices - Simple Model

Correlations between Electronic and Magnetic Properties in Semimagnetic Semiconductors

Contact Info

Product

Resources

About