Faraday Rotation Study of the Nearest-Neighbor Antiferromagnetic Exchange Interaction in Zn 1-xMnxSe in High Magnetic Fields

Yasuhira, T.; Uchida, K.; Matsuda, Yasuhiro H.; Miura, N.; Towardowski, Andrzej

doi:10.1143/jpsj.68.3436

Cited by 9 publications

(4 citation statements)

References 5 publications

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“…Two different techniques have been used for that, with details given in Refs. [19,20]. At the Institute for Solid State Physics (Chiba, Japan), nonpolarized PL has been measured at a temperature of 4.2 K. Magnetic fields up to 40 T were applied, and these data are presented in Section 3 of the paper.…”

Section: Methodsmentioning

confidence: 99%

Trions in ZnSe-Based Quantum Wells Probed by 50 T Magnetic Fields

Yakovlev¹,

Astakhov²,

Ossau³

et al. 2001

phys. stat. sol. (b)

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Singlet and triplet states of negatively charged excitons (trions) in ZnSe/(Zn,Be,Mg)Se quantum wells have been studied by means of photoluminescence in pulsed magnetic fields up to 50 T. Singlet state binding energies, measured for different well widths ranging from 48 to 190 A, show a monotonic increase with growing magnetic fields with a tendency to saturation. This behavior is in qualitative agreement with results of model calculations. Quantitatively, the binding energy of singlet states is underestimated by about 50%. The triplet state assigned to the "dark" triplet becomes detectable in magnetic fields above 15 T. A crossover of the triplet and singlet states is expected in magnetic fields of about 50 T.

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Section: Methodsmentioning

confidence: 99%

Trions in ZnSe-Based Quantum Wells Probed by 50 T Magnetic Fields

Yakovlev¹,

Astakhov²,

Ossau³

et al. 2001

phys. stat. sol. (b)

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“…Figure 2 shows another example of the streak spectra of the Faraday rotation in a sample with xϭ0.13, at Tϭ1.6 K. We can see the stepwise increase of the Faraday rotation, corresponding to the magnetization steps due to the magnetization of the Mn ion pairs. From such steps, the nearestneighbor antiferromagnetic exchange constant was obtained as J NN ϭϪ13.1Ϯ0.3 K. 9 In both Fig. 1͑b͒ and Fig.…”

Section: Methodsmentioning

confidence: 99%

“…In more highly doped samples, the effect of larger clusters reduces the FR due to the antiferromagnetic interaction and the saturation of the magnetization or FR takes place only in very high magnetic fields. 6,8 In a previous paper, 9 we determined J NN in Zn 1Ϫx Mn x Se from the Faraday rotation.…”

Section: Introductionmentioning

confidence: 99%

Giant Faraday rotation spectra ofZn1−xMnxSeobserved in high magnetic fields

et al. 2000

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We have observed interesting features in the energy and field dependencies of Faraday rotation spectra in Zn 1Ϫx Mn x Se under high magnetic fields up to 150 T. Continuous magneto-optical spectra were measured on a two-dimensional plane as a function of magnetic field and photon energy. As the rotation angle is obtained as continuous lines on the plane, we can detect any small change of the Faraday rotation, such as the stepwise small increase corresponding to the crossover of the magnetic energy levels of Mn ion pairs. In a sample with a relatively low Mn concentration (xϭ0.015), we found that the sign of the field coefficient of the Faraday rotation is reversed at some field due to the competition between the paramagnetic component due to the magnetization of Mn ions and the diamagnetic component due to the interband transition in the matrix crystal. We also found that the diamagnetic part in high fields shows a peculiar energy dependence, taking a minimum at around 2.4 eV. This result suggests that the diamagnetic part is determined not only by the interband transition but also by the d-d transition in Mn ions. The magnetic-field dependence of the diamagnetic part showed a kinklike behavior at around Bϭ80 T.

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“…For measuring Faraday rotation, monochromatic laser light is used. Using two polarizers placed before and after a specimen, the rotation angle due to the specimen is measured as an intensity change of the light [92]. The rotation angle contains information of magnetization in the case of a magnetic material, and the field-induced magnetization change is measurable even in a destructive magnetic field.…”

Section: Optical Measurementsmentioning

confidence: 99%

Physics in high magnetic fields

Motokawa¹

2004

Rep. Prog. Phys.

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Along with pressure and temperature, the magnetic field is one of the physical parameters that are used for the investigation of matter. It is an important tool for investigating magnetic and electronic properties from both the microscopic and macroscopic points of view. The interaction energy of a substance with a magnetic field, i.e. Zeeman energy or Landau energy, is small even at a field of 2 T as can be provided by a conventional electromagnet. Compared with the inner energies of a substance, magnetic fields as high as possible have been required for obtaining fine and detailed information on the internal structure and energy states. Due to the strong Maxwell stress, however, it is quite difficult to obtain a magnetic field higher than 50 T and much effort has been dedicated to the development of magnets ever since the laboratory electromagnet was invented.The purpose of this paper is to describe the physical effects that have been investigated and the phenomena that have been revealed using high magnetic fields, as well as the development of magnet technology and measurement technology. In addition, application to materials processing is mentioned as an active application of high magnetic fields.

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Faraday Rotation Study of the Nearest-Neighbor Antiferromagnetic Exchange Interaction in Zn_1-xMn_xSe in High Magnetic Fields

Cited by 9 publications

References 5 publications

Trions in ZnSe-Based Quantum Wells Probed by 50 T Magnetic Fields

Trions in ZnSe-Based Quantum Wells Probed by 50 T Magnetic Fields

Giant Faraday rotation spectra ofZn1−xMnxSeobserved in high magnetic fields

Physics in high magnetic fields

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