Recent progress in magneto-optics and research on its application
Various kinds of magneto-optical properties are investigated in rare earth orthochromites. From an analysis of Cr³⁺ exciton absorption in RCrO₃ (R=Tb, Dy, and Ho), it is unferred that these compounds exhibit an anomalous spin-reorientation in a magnetic field along the b axis, where the weak ferroma...
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| Published in: | Физика низких температур |
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| Date: | 2002 |
| Main Authors: | , |
| Format: | Article |
| Language: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2002
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/130237 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Recent progress in magneto-optics and research on its application / Norimichi Kojima, Kuniro Tsushima // Физика низких температур. — 2002. — Т. 28, № 7. — С. 677-690. — Бібліогр.: 49 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862724759082500096 |
|---|---|
| author | Norimichi Kojima Kuniro Tsushima |
| author_facet | Norimichi Kojima Kuniro Tsushima |
| citation_txt | Recent progress in magneto-optics and research on its application / Norimichi Kojima, Kuniro Tsushima // Физика низких температур. — 2002. — Т. 28, № 7. — С. 677-690. — Бібліогр.: 49 назв. — англ. |
| collection | DSpace DC |
| container_title | Физика низких температур |
| description | Various kinds of magneto-optical properties are investigated in rare earth orthochromites. From an analysis of Cr³⁺ exciton absorption in RCrO₃ (R=Tb, Dy, and Ho), it is unferred that these compounds exhibit an anomalous spin-reorientation in a magnetic field along the b axis, where the weak ferromagnetic moment of the Cr³⁺ spins rotates in the ac plane perpendicular to the b axis. In these compounds, when the R³⁺ spin configuration is disordered, an anomalous satellite band appears on the lower-energy side of the Cr³⁺ exciton absorption, which is associated with the breakdown of the k=0 selection rule due to the disorder of the R³⁺ spin configuration. In YbCrO₃, various kinds of cooperative excitations, such as a Cr³⁺ exciton coupled with an Yb³⁺ magnon and a Cr³⁺−Yb³⁺ exciton molecule, which are induced by the antisymmetric exchange interaction between the Cr³⁺ and Yb³⁺ spins, appear in the visible region. The propagation of these cooperative excitations depends strongly on the spin structure and the external magnetic field. In ErCrO₃, a photo-induced spin-reorientation takes place within 50 μs after the photo-irradiation corresponding to the ⁴A2g→²Eg transition of Cr³⁺, and it returns to the initial spin configuration in about 400 ms. This phenomenon is detected in the time-resolved Er³⁺ absorption spectra corresponding to the ⁴I₁₅/₂→⁴I₉/₂ transition. Finally, we briefly review the recent frontier research on applications developed mainly in Japan.
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| first_indexed | 2025-12-07T18:49:32Z |
| format | Article |
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| id | nasplib_isofts_kiev_ua-123456789-130237 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-12-07T18:49:32Z |
| publishDate | 2002 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
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| spelling | Norimichi Kojima Kuniro Tsushima 2018-02-09T11:03:40Z 2018-02-09T11:03:40Z 2002 Recent progress in magneto-optics and research on its application / Norimichi Kojima, Kuniro Tsushima // Физика низких температур. — 2002. — Т. 28, № 7. — С. 677-690. — Бібліогр.: 49 назв. — англ. 0132-6414 PACS: 78.20.Ls https://nasplib.isofts.kiev.ua/handle/123456789/130237 Various kinds of magneto-optical properties are investigated in rare earth orthochromites. From an analysis of Cr³⁺ exciton absorption in RCrO₃ (R=Tb, Dy, and Ho), it is unferred that these compounds exhibit an anomalous spin-reorientation in a magnetic field along the b axis, where the weak ferromagnetic moment of the Cr³⁺ spins rotates in the ac plane perpendicular to the b axis. In these compounds, when the R³⁺ spin configuration is disordered, an anomalous satellite band appears on the lower-energy side of the Cr³⁺ exciton absorption, which is associated with the breakdown of the k=0 selection rule due to the disorder of the R³⁺ spin configuration. In YbCrO₃, various kinds of cooperative excitations, such as a Cr³⁺ exciton coupled with an Yb³⁺ magnon and a Cr³⁺−Yb³⁺ exciton molecule, which are induced by the antisymmetric exchange interaction between the Cr³⁺ and Yb³⁺ spins, appear in the visible region. The propagation of these cooperative excitations depends strongly on the spin structure and the external magnetic field. In ErCrO₃, a photo-induced spin-reorientation takes place within 50 μs after the photo-irradiation corresponding to the ⁴A2g→²Eg transition of Cr³⁺, and it returns to the initial spin configuration in about 400 ms. This phenomenon is detected in the time-resolved Er³⁺ absorption spectra corresponding to the ⁴I₁₅/₂→⁴I₉/₂ transition. Finally, we briefly review the recent frontier research on applications developed mainly in Japan. The authors would like to thank many scientists
 who have given us an opportunity and collaborated
 with us for a long time of our recent work. Some of
 them are S. Sugano, I. Tsujikawa, K. Aoyagi,
 H. Kamimura, W. M. Yen, T. Tamaki, N. Watanabe,
 J. Dillon Jr., K. V. Rao, P. L. Richards,
 M. Pardavi-Horvath, and H. Szymczak
 V. V. Eremenko is undoubtedly to be specially
 cited as an exclusively intimate physicist among
 those. The authors also would like to express to
 thank many other younger research colleagues for a
 pleasant collaboration in many subjects in many occasions.
 This work was partly supported by the Science
 and Technical Research Laboratories of Japan
 broadcasting Corporation, and a Grant-in Aid for
 Science Research from the Ministry of Education,
 Science, Sports and Culture. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Обзор Recent progress in magneto-optics and research on its application Article published earlier |
| spellingShingle | Recent progress in magneto-optics and research on its application Norimichi Kojima Kuniro Tsushima Обзор |
| title | Recent progress in magneto-optics and research on its application |
| title_full | Recent progress in magneto-optics and research on its application |
| title_fullStr | Recent progress in magneto-optics and research on its application |
| title_full_unstemmed | Recent progress in magneto-optics and research on its application |
| title_short | Recent progress in magneto-optics and research on its application |
| title_sort | recent progress in magneto-optics and research on its application |
| topic | Обзор |
| topic_facet | Обзор |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/130237 |
| work_keys_str_mv | AT norimichikojima recentprogressinmagnetoopticsandresearchonitsapplication AT kunirotsushima recentprogressinmagnetoopticsandresearchonitsapplication |