Mn ion clustering in II-VI semimagnetic semiconductor heterostructures

Abstract

The results of photoluminescence excitation experiments in Cd 1Ϫx Mn x Te and Zn 1Ϫx Mn x Se diluted magnetic semiconductor quantum-well structures are shown to be consistent with the occurrence of a clustering of the magnetic Mn ions. Possible clustering mechanisms are discussed briefly together with alternative explanations of the data. ͓S0163-1829͑98͒09835-X͔

113CdNMR study of transferred hyperfine interactions in the dilute magnetic semiconductorsCd1−Ladizhansky1, Lyahovitskaya2, Vega3 1999Phys. Rev. B231170View full textAdd to dashboardCite

“…[5][6][7][8] The lattice constants and band parameters of these alloys depend strongly on the concentration of the paramagnetic ions. Also, their magnetic properties are substantially modified in the presence of magnetic impurities.…”

Semimagnetic semiconductor quantum wells: magnetic polarons and paramagnetic effects

“…Details of the structural data of the samples are summarized in table 1. Photoluminescence emission experiments were carried out at various external magnetic fields in a superconducting magnet at a temperature of 1.8 K. Details of the sample preparation and the results of photoluminescence excitation and reflectivity measurements on the samples can be found in the literature [2][3][4].…”

“…Another effect was termed 'alloy clustering' and denotes the occurrence of a non-random distribution of the Mn ions in the crystal [10]. Recently a detailed comparison between theoretical calculations and photoluminescence excitation experiments showed that this effect can alter the effective temperature as well as the effective spin of the Mn ions [2].…”

“…The magneto-optical properties of diluted magnetic semiconductor (DMS) quantum well structures consisting of non-magnetic well material surrounded by semimagnetic barrier material have received a great deal of attention [1]. However, far fewer investigations were concerned with quantum wells consisting of magnetic wells surrounded by magnetic barriers [2][3][4]. The interest in these systems arises mainly from the large carrier-magnetic ion exchange interaction resulting in Zeeman splittings of the excitonic energy levels of up to several tens of meV.…”

Concentration Effect of Mn[sup 2+] on the Luminescence Properties of Ba[sub 0.75]Al[sub 11]O[sub 17.25]:Mn[sup 2+]

“…2 These phenomena have also been found in other Mn 2+ activated phosphors and ascribed to the formation of Mn 2+ -Mn 2+ pair centers which exhibit different spectroscopic characteristics, especially much shorter decay time than those of isolated Mn 2+ . [2][3][4][5][6][7] But the reports on the variation of optical properties of BaAl 12 2+ with the increase of Mn 2+ concentration, but they considered that no Mn 2+ -Mn 2+ pairs exist because emission peak shift was not observed by them. 1 However, we do find peak movement in other authors' report though they did not mention it.…”