Zener Model Description of Ferromagnetism in Zinc-Blende Magnetic Semiconductors

Abstract

Ferromagnetism in manganese compound semiconductors not only opens prospects for tailoring magnetic and spin-related phenomena in semiconductors with a precision specific to III-V compounds but also addresses a question about the origin of the magnetic interactions that lead to a Curie temperature (T(C)) as high as 110 K for a manganese concentration of just 5%. Zener's model of ferromagnetism, originally proposed for transition metals in 1950, can explain T(C) of Ga(1-)(x)Mn(x)As and that of its II-VI counterpart Zn(1-)(x)Mn(x)Te and is used to predict materials with T(C) exceeding room temperature, an important step toward semiconductor electronics that use both charge and spin.

Search for Origin of Room Temperature Ferromagnetism Properties in Ni-Doped ZnO Nanostructure

“…It also demonstrates that by simple change in the shape and size of nanomaterial it is possible to tune the physical properties of nanostructure [12][13][14] . However, present and existing theories and results [5][6][7] cannot satisfactorily articulate the origin of the witnessed ferromagnetism. Recently, RT-FM was detected in undoped in addition to nonmagnetic element doped in semiconductors.…”

“…In addition to this, it is also recognized as semiconductor with large excitonic binding energy (60meV) 4 , wide-band gap (3.37eV) and exhibits multifunctional properties. The idea of DMS with dilute doping of magnetic elements in a host semiconductor to create the RT magnetic semiconductor was first predicted by Dielt et al 5 on the p-type wide band gap semiconductor GaN and Mn doped ZnO. Similarly Sato et al 6,7 by theoretically calculation, based on local density approximation shows ferromagnetic ordering with T C above room temperature for n- elements such as Cu, Ni, Co, Fe, Mn, etc.…”

Magnetic Properties of ZnO Nanoparticles

“…Text Diluted Magnetic Semiconductors (DMS), consisting on semiconductor matrices containing a small amount of magnetic impurities are among the most interesting new magnetic materials in view of their potential applications for spintronics [1,2]. The main challenge for this kind of materials is to present a Curie Temperature (TC) above 300 K in order to be useful for technological applications.…”

Tailored Near‐Infrared Photoemission in Fluoride Perovskites through Activator Aggregation and Super‐Exchange between Divalent Manganese Ions

“…The now‐observed NIR emission clearly cannot be attributed to the typically isolated Mn 2+ ions; however, one possible explanation is given by the occurrence of Mn 2+ ion aggregation. Interionic coupling between transition metal ions often leads to fascinating physical phenomena, such as ferromagnetism in Zn 1– x Mn x Te15 and ZnO:Mn,16 multiferroism in BiFeO 3 thin films,17 superconduction in Y/La–Ba/Sr–Cu–O ceramics,18, 19 and giant magnetoresistance in thin films of La 2/3 Ba 1/3 MnO x 20 and La 0.67 Ca 0.33 MnO x 21. These physical properties are primarily ascribed to the delocalization and interaction of the 3d electrons of transition metal ions.…”