本文报道了Cr97.02Al2 98和掺钒的(Cr98.26Al1.4)98 72V1.28、(Cr96.04Al3.96)98.69V1.31合金在10~450 K温区的电阻率和热膨胀系数随温度的变化.随着温度降低,Cr97.02Al2.98合金经历了顺磁-公度自旋密度波(CSDW)-非公度自旋密度波(ISDW)的转变.Neel温度以下电阻率出现上升趋势,与SDW反铁磁能隙的逐渐打开有关.热膨胀-温度曲线在Neel温度附近呈现一个明显的跳跃行为,是磁转变相关的磁体效应.低于CSDW-ISDW转变温度,电阻率的增大是由于磁散射在低温下增强.用公式p=P0+AlnT+BT2+CTδ对三个合金10~80 K温区内电阻率-温度曲线的拟合结果表明,随着钒掺杂的增加,磁散射和s~d电子散射减小.Cr97.02Al2.98合金中掺入少量钒就能压制SDW.
参考文献
[1] | E Fawcett .[J].Reviews of Modern Physics,1988,60:209. |
[2] | M Acet;T Schneider;H Zahres;W Stamm,E F Wassermann,W Pepperhoff .[J].PHYSICA,1989,B161:63. |
[3] | E Fawcett;S A Werner;A Goldman;G Shirane .[J].Physical Review Letters,1988,61:558. |
[4] | Fawcett;H L Albert;V Yu Galkin;D R Noakes,J V Yakhmi .[J].Reviews of Modern Physics,1994,66:25. |
[5] | W M Xu;P Zheng;Z J Chen;B G shen .[J].J Magn Magn Matt,1997,172:183. |
[6] | B M Wu;D S Yang;S Sheng;Y L Du,W M Xu .[J].J Magn Magn Matt,1999,202:426. |
[7] | 吴柏枚,杨东升,盛松,徐未名,陈兆甲.Cr75FexMn25-x(x=16,18)合金的热导[J].物理学报,1999(06):1147-1151. |
[8] | 吴柏枚,杨东升,盛松,刘卫,徐未名.Cr75Fe16Mn9合金的低频内耗[J].物理学报,1999(08):1503-1508. |
[9] | 李波;吴柏枚;高惠平;王明,杜衍,王小平 .[J].低温物理学报,2005,27(08) |
[10] | A Baran;H L Albert;A M strydom;P de V du Plessis .[J].Physical Review,1992,B45:10473. |
[11] | S Arajs;N L Reevesand;E E Anderson .[J].Journal of Applied Physics,1971,42:1691. |
[12] | H L Albert;S J Burger .[J].SOLID STATE COMMUNICATIONS,1978,28:771. |
[13] | J B Sousa;M M Amado;R P Pinto;M F Pinheiro,M E Braga,J M Moreira,L E Hedman,H U Astrom,L Khlaif,P Walker G Garton and D Hukin .[J].JOURNAL OF PHYSICS F:METAL PHYSICS,1980,10:2535. |
[14] | J V Yakhmi;I K Gopalakrishnan;R M Iyer;J L Stanford .[J].Journal of Applied Physics,1987,61:3994. |
[15] | H L Albert;J A J Lourens .[J].Physical Review,1984,B29:5279. |
[16] | Y Tsuchiya;H Takita;S Murayama;Y Hamaguchi .[J].Journal of the Physical Society of Japan,1993,62:3764. |
[17] | Y Y Wei;B M Wu;H P Gao;B LI .[J].Physics Letters A,2007,362:239. |
[18] | V Yu Galkin;W A Ortiz;E Fawcett .[J].Journal of Applied Physics,1998,83:7384. |
[19] | H M Rosenberg.Low Temperature Solid State Physics[M].OXFORD:OXFORD UNIVERSITY PRESS,1963 |
[20] | M T Beal-Monod .[J].Physical Review,1969,178:874. |
[21] | 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. |
[22] | B M Wu;B LI;W H Zheng;M Ausloos,Y L Du,J F Fagnard,Ph Vanderbemden .[J].Journal of Applied Physics,2005,97:103908. |
[23] | R B Roberts;G K White;E Fawcett .[J].PHYSICA,1983,B119:63. |
[24] | R S Krishnan;R Srinivasan;S Devanarayanan.Thermal Expansion of Crystals[M].Oxford and New York:Pergamon Press,1979 |
[25] | G K White .[J].PROCEEDINGS OF THE PHYSICAL SOCIETY,1965,86:159. |
[26] | 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. |
[27] | 高惠平,吴柏枚,李波,魏义永.Nd0.3Sr0.7Mn1-xCrxO3(0.01≤x≤0.15)的低温热导率研究[J].低温物理学报,2006(03):228-231. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%