报道Nd0.3Sr0.7Mn1-xCrxO3(0.01≤x≤0.15)的热导率在10～300K温区内随温度和Cr含量的变化关系.在所测温区,随着Cr掺杂的增加,样品热导率值整体上逐渐减小,但在x=0.15时,出现反弹.热导率值在绝缘体-金属转变附近有很大提高,这个提高随Cr含量的增加逐渐被压制,直到x=0.15消失.分析指出热导率在绝缘体-金属转变附近的提高是由声子热导率和自旋相关热导率两部分贡献的;Cr掺杂通过电荷、晶格和自旋相互作用影响和制约了热导率随温度的变化.结果表明体系中自旋对热导率的调制作用是不可忽略的.
参考文献
| [1] | M B Salamon;M Jaime .[J].Reviews of Modern Physics,2001,73:583. |
| [2] | C Zener .[J].Physical Review,1951,82:403. |
| [3] | A J Millis;P B Littlewood;B I Shraiman .[J].Physical Review Letters,1995,74:5144. |
| [4] | A J Millis;B I Shraiman;R Mueller .[J].Physical Review Letters,1996,77:175. |
| [5] | A J Millis .[J].Nature,1998,392:147. |
| [6] | A Moreo;S Yunoki;E Dagotto .[J].Science,1999,283:2034. |
| [7] | E Dagotto;T Hotta;A Moreo .[J].Physics Reports,2001,344:1. |
| [8] | R Berman.Thermal Conduction in Solids[M].Oxford:Clarendon Press,1976 |
| [9] | T Lorenz;M Hofmann;M Gruninger;A.Freimuth, G.S.Uhrig, M,Dumm, M.Dressel .[J].Nature,2002,418:614. |
| [10] | D W Visser;A P Ramirez;M A Subramanian .[J].Physical Review Letters,1997,78:3947. |
| [11] | J Hejtmánek;Z Jirák;S Krupicka;C.Martin, Ch.Simon, A.Maignan, B.Raveau E. GriVei J P .[J].Issi J Appl Phys,1997,83:7204. |
| [12] | J L Cohn;J J Neumeier;C P Popoviciu;K.J.McClellan, Th.Leventouri .[J].Physical Review,1997,56:8495. |
| [13] | 郑卫华,吴柏枚,杨东升,李荐杨,柳学榕,李波,周雅琴.La1-xCaxMnO3材料的热导与电导[J].低温物理学报,2001(03):216-221. |
| [14] | WU Bai-Mei,M. Ausloos,DU Ying-Lei,ZHENG Wei-Hua,LI Bo,J. F. Fagnard,Ph. Vanderbemden.Spin Glass Behaviour and Spin-Dependent Scattering in La0.7Ca0.3Mn0.9Cr0.1O3 Perovskites[J].中国物理快报（英文版）,2005(03):686-689. |
| [15] | Y Sun;X J Xu;Y H Zhang .[J].Physical Review,2001,63:054404. |
| [16] | F Rivadulla;M A Lopez-Quintela;L E Hueso;P Sande, J Rivas, R D Sanchez .[J].Physical Review,2000,62:5678. |
| [17] | R Ganguly;I K Gopalakrishnan;J V Yakhmi .[J].Physica,2000,275:308. |
| [18] | A Barnabe;A Maignan;M Hervieu;F Damay, C Martin B Raveau .[J].Applied Physics Letters,1997,71:3907. |
| [19] | M Rubinstein;D J Gillespie;J E Snyder;T M Tritt .[J].Physical Review,1997,56:5412. |
| [20] | 郑卫华,吴柏枚,李波,杨东升,曹烈兆.La0.7Ca0.3Mn1-xCrxO3 （0.01≤x≤0.60）的低温热导[J].低温物理学报,2002(03):230-235. |
| [21] | Bai-Mei Wu;Bo Li;Wei-Hua Zheng;M.Ausloos, Ying-Lei Du, J.F.Fagnard, Ph.Vanderbemden .[J].Journal of Applied Physics,2005,97:103908. |
| [22] | 吴柏枚,李毕友,杨东升,李波,郑卫华,盛松.低温热导率测试系统的建立和自动化[J].低温物理学报,2003(z1):248-252. |
| [23] | Hess C;Buchner B;Ammerahl U;Colonescu L, HeidrichMeisner F, Brenig W, Revcolevschi A .[J].Physical Review Letters,2003,90:197002. |
| [24] | B.M. Wu;D.S. Yang .The transport properties and internal friction related to the antiferromagnetic transition in Cr75(FexMn1-x)25 alloys[J].Journal of Magnetism and Magnetic Materials,1999(2/3):426-430. |
| [25] | 高惠平,李波,余勇,阮可青,吴柏枚.Nd1.67Sr0.33NiO4中的热导反常[J].物理学报,2004(11):3853-3857. |
| [26] | H R Rosenberg.Low Temperature Solid State Physics[M].Oxford:Oxford University Press,1963 |
| [27] | J Hejtmanek;Z Jirak;M Marysko;S Krupicka, C Martin, A Maignan, M Hervieu, B Raveau .[J].Physical Review,1999,60:14057. |
| [28] | E J Gordon;R A Fisher;Y X Jia;N E Philips, S F ReKlis, D A Wright, A Zettl .[J].Physical Review,1999,59:127. |
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