EXCHANGE ENERGIES, BOUND MAGNETIC POLARONS, AND MAGNETIZATION IN CDSE-CO AND CDS-CO

被引：17

作者：

GENNSER, U

LIU, XC

VU, TQ

HEIMAN, D

FRIES, T

SHAPIRA, Y

DEMIANIUK, M

TWARDOWSKI, A

机构：

[1] TUFTS UNIV, DEPT PHYS, MEDFORD, MA 02155 USA

[2] WOJSKOWA AKAD TECH, PHYS TECH INST, PL-00908 WARSAW, POLAND

[3] UNIV WARSAW, INST EXPTL PHYS, PL-00681 WARSAW, POLAND

[4] MIT, FRANCIS BITTER NATL MAGNET LAB, CAMBRIDGE, MA 02139 USA

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.51.9606

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The sp-d exchange energies, bound magnetic polarons, and magnetization have been studied in Cd1-xCoxSe and Cd1-xCoxS. For x=0.02-0.05, magnetization measurements of the Co2+ ions at liquid-helium temperatures are adequately described by a modified Brillouin function for pure spin S=3/2 ions. In spin-flip Raman-scattering (SFRS) measurements from donor-bound electrons we observe a large Zeeman splitting of ∼4-10 meV at high magnetic fields, and bound magnetic polaron energies of 0.2-0.4 meV at B=0. The s-d exchange energy between conduction electrons and Co2+ ions, obtained by combining the SFRS and magnetization results, is found to be αN0=274±6 meV for CdSe, and αN0=179±4 meV for CdS. For Cd1-xCoxSe, from reflectivity measurements and the αN0 value we obtain βN0=-2120±50 meV. © 1995 The American Physical Society.

引用

页码：9606 / 9611

页数：6

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