ΠΠ²Π°Π½ΡΠΎΠ²ΡΠ΅ ΡΠ°Π·ΠΎΠ²ΡΠ΅ ΠΏΠ΅ΡΠ΅Ρ ΠΎΠ΄Ρ ΠΈ Π½ΠΈΠ·ΠΊΠΎΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΡΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π° ΠΌΠ°Π³Π½Π΅ΡΠΈΠΊΠΎΠ² Ρ ΡΠ΅Π»ΡΠΌ ΡΠΏΠΈΠ½ΠΎΠΌ ΠΈ Π±ΠΎΠ»ΡΡΠΎΠΉ ΠΎΠ΄Π½ΠΎΠΈΠΎΠ½Π½ΠΎΠΉ Π°Π½ΠΈΠ·ΠΎΡΡΠΎΠΏΠΈΠ΅ΠΉ ΡΠΈΠΏΠ° Β«Π»Π΅Π³ΠΊΠ°Ρ ΠΏΠ»ΠΎΡΠΊΠΎΡΡΡΒ»
Ishida T., Nakamura T., Fujii Y. et al.- NMR Study of Field Induced 2-Step Phase Transition in Singlet-Ground-State Antiferromagnet CsFeBr3 // Progress of Theoretical Physics Supplement. 2002. — Vol. 145. — Pp. 134β137. Borner B., Visser B., Steigenberger U. et aiMagnetic excitations in the quasi one-dimensional antiferromagnetic singlet groundstate system CsFeBr3 // Physica B: Condensed Matter… Π§ΠΈΡΠ°ΡΡ Π΅ΡΡ >
Π‘ΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅
- ΠΠ»Π°Π²Π° I. ΠΠ²Π΅Π΄Π΅Π½ΠΈΠ΅
- 1. 1. Π¦Π΅Π»Ρ Π΄ΠΈΡΡΠ΅ΡΡΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ ΡΠ°Π±ΠΎΡΡ
- 1. 2. ΠΡΠ°ΡΠΊΠΎΠ΅ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅ Π΄ΠΈΡΡΠ΅ΡΡΠ°ΡΠΈΠΈ
- ΠΠ»Π°Π²Π° II. Π’Π΅Ρ
Π½ΠΈΠΊΠ° ΠΈ Π΅Ρ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΡ ΠΏΡΠΈ Π’ = Π
- 2. 1. ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ΠΈΠ΅ ΡΠΏΠΈΠ½ΠΎΠ²ΡΡ ΠΎΠΏΠ΅ΡΠ°ΡΠΎΡΠΎΠ²
- 2. 2. ΠΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΡΠ΅Ρ
Π½ΠΈΠΊΠΈ
- 2. 2. 1. Elementary excitation spectrum
- 2. 2. 2. ΠΠ½Π΅ΡΠ³ΠΈΡ ΠΎΡΠ½ΠΎΠ²Π½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠ½ΠΈΡ
- 2. 3. ΠΠ±ΡΡΠΆΠ΄Π΅Π½ΠΈΠ΅ ΠΈ ΡΡΠ°Π²Π½Π΅Π½ΠΈΠ΅ Ρ ΠΏΡΠ΅Π΄ΡΠ΄ΡΡΠΈΠΌΠΈ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ°ΠΌΠΈ ΠΈ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠΎΠΌ
- 2. 3. 1. ΠΡΡΠ³ΠΈΠ΅ ΡΠΏΠΈΠ½ΠΎΠ²ΡΠ΅ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ΠΈΡ Π΄Π»Ρ S =
- 2. 3. 2. ΠΡΡΠ³ΠΈΠ΅ ΠΏΠΎΠ΄Ρ ΠΎΠ΄Ρ ΠΊ Π²ΡΡΠΈΡΠ»Π΅Π½ΠΈΡ ΡΠΏΠ΅ΠΊΡΡΠ°
- 2. 3. 3. Π‘ΡΠ°Π²Π½Π΅Π½ΠΈΠ΅ Ρ ΡΠΈΡΠ»Π΅Π½Π½ΡΠΌΠΈ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ°ΠΌΠΈ
- 2. 3. 4. ΠΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΠΊ NiCl2−4SC (NH2)
- 3. 1. ΠΠΎΠ΄ΠΈΡΠΈΠΊΠ°ΡΠΈΡ ΡΠ΅Ρ Π½ΠΈΠΊΠΈ Π² ΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠΌ ΠΏΠΎΠ»Π΅
- 3. 2. Π’ = 0 and Π Ρ
- 3. 3. Π’Ρ 0 and Π― ~ ΠΠ‘1 (0)
- 3. 4. ΠΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΠΊ DTN.Β¦
- 4. 1. Π‘ΠΏΠΈΠ½-Π²ΠΎΠ»Π½ΠΎΠ²ΠΎΠΉ Π°Π½Π°Π»ΠΈΠ·
- 4. 2. ΠΠΊΡΠ΅ΡΡΠ½ΠΎΡΡΡ ΠΏΠΎΠ»Ρ Π½Π°ΡΡΡΠ΅Π½ΠΈΡ
- 4. 3. ΠΠ±ΡΡΠΆΠ΄Π΅Π½ΠΈΠ΅ ΠΈ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΠΊ DTN
ΠΠ²Π°Π½ΡΠΎΠ²ΡΠ΅ ΡΠ°Π·ΠΎΠ²ΡΠ΅ ΠΏΠ΅ΡΠ΅Ρ ΠΎΠ΄Ρ ΠΈ Π½ΠΈΠ·ΠΊΠΎΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΡΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π° ΠΌΠ°Π³Π½Π΅ΡΠΈΠΊΠΎΠ² Ρ ΡΠ΅Π»ΡΠΌ ΡΠΏΠΈΠ½ΠΎΠΌ ΠΈ Π±ΠΎΠ»ΡΡΠΎΠΉ ΠΎΠ΄Π½ΠΎΠΈΠΎΠ½Π½ΠΎΠΉ Π°Π½ΠΈΠ·ΠΎΡΡΠΎΠΏΠΈΠ΅ΠΉ ΡΠΈΠΏΠ° Β«Π»Π΅Π³ΠΊΠ°Ρ ΠΏΠ»ΠΎΡΠΊΠΎΡΡΡΒ» (ΡΠ΅ΡΠ΅ΡΠ°Ρ, ΠΊΡΡΡΠΎΠ²Π°Ρ, Π΄ΠΈΠΏΠ»ΠΎΠΌ, ΠΊΠΎΠ½ΡΡΠΎΠ»ΡΠ½Π°Ρ)
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