-
- Minkiewicz V. J.
- Brookhaven National Laboratory
-
- Shirane G.
- Brookhaven National Laboratory
書誌事項
- タイトル別名
-
- Soft Phonon Modes in KMnF<SUB>3</SUB>
この論文をさがす
抄録
Neutron inelastic scattering experiments show that the phase transition of KMnF3 at 184°K is a result of the softening of the Γ25 phonon mode at the [111] zone boundary. The over-all characteristics of the Γ25 mode are similar to those that have been observed for this same mode in SrTiO3 near its 110°K phase transition. We also observe that the M3 mode at the [110] zone boundary has the very low energy of 3.1±0.2 MeV at room temperature, and condenses not at 184°K but rather in the vicinity of its Néel temperature, 88°K. The X-ray studies by Beckman and Knox indicate that the space group of KMnF3 below 184°K is the orthorhombic PbnmD(2h16). This orthorhombic phase is consistent with our observation that the Γ25 mode is responsible for the 184°K transition in that the dominant contribution to the rotation of the fluorine octahedra is a superposition of two of the three triply degenerate modes of Γ25 condensing at the transition temperature.
収録刊行物
-
- Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｐｈｙｓｉｃａｌ Ｓｏｃｉｅｔｙ ｏｆ Ｊａｐａｎ
-
Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｐｈｙｓｉｃａｌ Ｓｏｃｉｅｔｙ ｏｆ Ｊａｐａｎ 26 (3), 674-680, 1969
一般社団法人 日本物理学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390001204190937472
-
- NII論文ID
- 110001957866
- 210000081069
- 130003892176
-
- NII書誌ID
- AA00704814
-
- BIBCODE
- 1969JPSJ...26..674M
-
- COI
- 1:CAS:528:DyaF1MXhtFyqtL4%3D
-
- ISSN
- 13474073
- 00319015
-
- NDL書誌ID
- 8501942
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可