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利用常规的固相反应法制备了单相多晶样品Sr14Cu24O41+δ,并在不同的温度下进行退火,改变样品中的氧含量.能量色散谱(EDS)显示样品中的氧含量随退火温度的增加而减少.磁化率温度特性的研究显示,600 ℃下退火的样品中的二聚体数最多.Raman光谱的研究显示,伴随着样品中氧含量的偏离,由无序或低能磁激发诱导的一些Raman振动模出现规律性的变化.进一步的分析证实这种Raman光谱的变化行为与晶体结构中由于氧含量的不同
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关键词:
- Raman散射 /
- 自旋梯状化合物 /
- Sr14Cu24O41 /
- 氧含量
The spin ladder compounds Sr14Cu24O41+δ were synthesized by conventional solid state reaction method with subsequent annealing at 400, 500, 600, 800 and 900 ℃, respectively. The energy dispersive spectroscope (EDS) measurement confirms that the content of oxygen in the samples decreases with the increasing of annealing temperature. The measurement of magnetic susceptibility reveals that the sample annealing at 600 ℃ has the largest number of dimers. The measurement of Raman spectrum shows some new Raman vibrational features. Corresponding to δ>0 or δα=cl/cc is near the minimal value 10/7 and the Cu—O bond has relatively long length.-
Keywords:
- Raman scattering /
- spin ladder compound /
- Sr14Cu24O41 /
- oxygen content
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[24] Popovic ' Z V, Devic ' S D, Popov V N, Dhalenne G, Revcolevschi A 1995 Phys. Rev. B 52 4185
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[1] Uehara M, Nagata T, Akimitsu J, Takahashi H, Mori N, Kinoshi K 1996 J. Phys. Soc. Jpn. 65 2764
[2] Ohta T, Izumi F, Onoda M, Isobe M, Takayama-Muromachi E, Hewat A W 1997 J. Phys. Soc. Jpn. 66 3107
[3] F, Yu Z X, Tang Z, Shi J 2008 Acta Phys. Sin. 57 4334(in Chinese)[汪丽莉、熊 锐、魏 伟、胡 妮、林 颖、朱本鹏、汤五丰、余祖兴、汤 征、石 兢 2008 物理学报 57 4334]
[4] Abbamonte P, Blumberg G, Rusydl A, Gozar A, Evans P G, Siegrist T, Venema L, Eisaki H, Isaacs E D, Sawatzky G A 2004 Nature 431 1078
[5] Kato M, Shiota K, Koike Y 1996 Physica C 258 284
[6] Nücker N, Merz M, Kuntscher C A, Gerhold S, Schuppler S, Neudert R, Golden M S, Fink J, Schild D, Stadler S, Chakarian V, Freeland J, Idzerda Y U, Conder K, Uehara M, Nagata T, Goto J, Akimitsu J, Motoyama N, Eisaki H, Uchida S, Ammerahl U, Revcolevschi A 2000 Phys. Rev. B 62 14384
[7] Zhang F C, Rice T M 1988 Phys. Rev. B37 3759
[8] Cartre S A, Batlogg B, Cava R J, Krajewski J J, Peck J W F, Rice T M 1996 Phys. Rev. Lett. 77 1378
[9] Eccleston R S, Uehara M, Akimitsu J, Eisaki H, Motoyama N, Uchida S 1998 Phys. Rev. Lett. 81 1702
[10] Braden M, Etrillard J, Gukasov A, Ammerahl U, Revcolevschi A 2004 Phys. Rev. B69 214426
[11] Smaalen S V 2003 Phys. Rev. B67 026101
[12] Gotoh Y, Yamaguchi I, Eisaki H, Nagata T, Akimitsu J 2006 Physica C445—448 107
[13] Isobe M, Onoda M, Ohta T, Izumi F, Kimoto K, Takayama-Muromachi E, Hewat A W, Ohoyama K 2000 Phys. Rev. B62 11667
[14] Wang L L, Xiong R, Wei W, Hu N, Lin Y, Zhu B P, Tang W
[15] Lu S P, Dong W C, Li D Z, Li Y Y 2009 Acta Phys. Sin. 58 S094 (in Chinese) [陆善平、董文超、李殿中、李依依 2009 物理学报 58 S094]
[16] Popovic ' Z V, Konstantinovic ' M J, Ivanov V A, Khuong O P, Gajic ' R, Vietkin A, Moshchalkov V V 2000 Phys. Rev. B 62 4963
[17] Osada M, Kakihana M, Nagai I, Noji T, Adachi T, Koike Y, Bckstrm J, Kll M, Brjesson L 2000 Physica C338 161
[18] Abrashe M V, Thomsen C, Surtchev M 1997 Physica C 280 297
[19] Hu N, Xiong R, Wei W, Wang Z Y, Wang L L, Yu Z X, Tang W F, Shi J 2008 Acta Phys. Sin. 57 5267 (in Chinese) [胡 妮、熊 锐、魏 伟、王自昱、汪丽莉、余祖兴、汤五丰、 石 兢 2008 物理学报 57 5267]
[20] Abrashev M V, Litvinchuk A P, Thomsen C 1997 Phys. Rev. B 55 9136
[21] Heyen E T, Liu R, Thomsen C, Kremer R, Cardona M, Karpinski J, Kaldis E, Rusiecki S 1990 Phys. Rev. B41 11058
[22] Kliche G, Popovic ' Z V 1990 Phys. Rev. B42 10060
[23] Tajima S, Ido T, Ishibashi S, Itoh T, Eisaki H, Mizuo Y, Arima T, Takagi H, Uchida S 1991 Phys. Rev. B43 10496
[24] Popovic ' Z V, Devic ' S D, Popov V N, Dhalenne G, Revcolevschi A 1995 Phys. Rev. B 52 4185
[25] Hiroi Z, Amelinckx S, van Tendeloo G, Kobayashi N 1996 Phys. Rev. B54 15849
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