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1、phys. stat. sol. (c) 4, No. 11, 4181 4187 (2007) / DOI 10.1002/pssc.200675906 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Detailed magnetic and structural properties of exchange-biased La1-x CaxMnO3有交换偏向的La1-x CaxMnO3详细磁性和结构性质M. E. Gmez*, 1, G. Campillo1, J.-G. Ramirez1, A. Hoffmann2, and J. Gui
2、mpel3 1 Departamento de Fsica, Universidad del Valle, A. A. 25360 Cali, Colombia 2 Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA 3 Centro Atmico de Bariloche, Instituto Balseiro, 8400 S. C. de Bariloche, Argentina Received 16 October 2006, revised 27 March 2007, acc
3、epted 30 May 2007 Published online 26 October 2007 PACS 61.10.Nz, 73.21.Cd, 75.30.Et, 75.30.Gw, 75.47.Lx, 75.70.Cn 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim 我们测量了La1-x CaxMnO3由磁性层（FM）（x=0.33）和反铁磁性层（AF）(x=0.67)构成的异性结构的磁性和磁输送性。我们在SrTiO3基体上沿(001)的取向方向上通过高压喷浅技术生成FM/AF超晶格。我们对称地改变铁磁层的厚度，而反铁磁层厚度保持不变，
4、或反之改变反铁磁层的厚度而铁磁层厚度不变，总的超晶格厚度保持不变。通过对亚锰酸盐（001）Bragg反射附近多峰值的观察，XRD证实了超晶格结构的存在。我们提取了晶格的平均晶格常数以及其对铁磁性和反铁磁性厚度的依赖关系。我们引入了场冷却（FC）和零场冷却（ZFC），磁热和磁阻测量。AF层在低于Nel温度时交换偏向效应的存在是通过在FC之后对磁滞回路的测量展现出来的。我们研究了磁性参数和铁磁性与反铁磁性层厚度之间的关系。我们发现，结构，磁化强度和磁传输性质作为F层厚度的函数是相关的。References 1 R.L. Stamps, J. Phys. D: Appl. Phys. 33, R24
5、7 (2000). 2 W. Meiklejohn and C. Bean, Phys. Rev. 105, 904 (1957). 3 Y. Ijiri, J. Phys.: Condens. Matter. 14, R947 (2002), and references therein. 4 J. Nogus and I.K. Schuller, J. Magn. Magn. Mater. 192, 203 (1999). 5 I. Panagiotopoulos, C. Christides, N. Moutis, M. Pissas, and D. Niarchos, J. Appl.
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7、Rev. Col. Fs. 35, 267 (1993). 10 P. Prieto, M.E. Gmez, G. Campillo, A. Berger, E. Baca, R. Escudero, F. Morales, J. Guimpel, and N. Haber-korn, phys. stat. sol. (a) 201, 2343 (2004). 11 M.E. Gmez, G. Campillo, J.G. Ramrez, P. Prieto, A. Hoffmann, J. Guimpel, N. Haberkorn, A. Cond, and F. Lovey; IEEE
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10、Colombia, 2006. 16 E.S. Vlakhov, R.A. Chakalov, R.I. Chakalova, K.A. Nenkov, K. Drr, A. Handstein, and K.H. Mller, J. Appl. Phys. 83, 2152 (1998). 17 S.A. Howard, J.K. Yau, and H.U. Anderson, J. Appl. Phys. 65, 1492 (1989). 18 E.E. Fullerton, I.K. Schuller, H. Vanderstraeten, and Y. Bruynseraede, Ph
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12、sko-Vlasov et al., Phys. Rev. Lett. 84, 2239 (2000). Magnetoresistance of coherently strained La2/3Ba1/3MnO3 /SrTiO3 superlattices连贯约束La2/3Ba1/3MnO3 /SrTiO3超晶格的磁滞Yafeng Lu,1 J. Klein,1 C. Ho fener,1 B. Wiedenhorst,1 J. B. Philipp,1,2 F. Herbstritt,1 A. Marx,1,2 L. Alff,1,2 and R. Gross1,2,*1II. Phys
13、ikalisches Institut, Universita tzuKo ln, Zu lpicher Strasse 77, D-50937 Ko ln, Germany2Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meissner Strasse 8, D-85748 Garching, Germany(Received 20 July 2000)通过激光分子束取向附生法，将一系列的SrTiO3 /La2/3Ba1/3MnO3多层薄膜焊接在(100)SrTiO3 和(100) NdG
14、aO3基体上。通过平面内约束，改变SrTiO3和La2/3Ba1/3MnO3层的厚度，平面外晶格常数可以连续地从3.916 调整到3.975 。应变导致了La2/3Ba1/3MnO3的双轴扭曲以致严重地影响到电传输性质和磁滞。我们的测量结果表明，相应于最大电阻系数对温度曲线以及所测量的磁致电阻，在和之间有一个明确的关系。通过改变应变，我们可以导出材料性质灵敏度与双轴应力之间的关系。我们的数据为在掺杂亚锰酸盐的Jahn-Teller电子-声子耦合提供了关联的证据。我们的分析进一步表明双轴应力是一个很重要的变量，在基于掺杂亚锰酸盐的磁电子设备薄膜结构设计中是必须要考虑的。*Electronic a
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