Chemical Pressure Tuning of Magnetic Coupling in the La1.4Sr1.6Mn2O7 Bilayered Manganite

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• 作者：Lorenzo Malavasi ; Clemens Ritter ; M. Cristina Mozzati ; Carlo B. Azzoni ; Giorgio Flor
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：November 22, 2007
• 年：2007
• 卷：111
• 期：46
• 页码：17173 - 17175
• 全文大小：92K
• 年卷期：v.111,no.46(November 22, 2007)
• ISSN：1932-7455

文摘

In this paper, the effect of the chemical pressure induced by the Sr replacement for Ca in the La_1.4Sr_1.6Mn₂O₇lattice is directly probed by means of neutron diffraction as a function of temperature. The results show aprogressive change of the magnetic coupling from ferromagnetic to antiferromagnetic by increasing the Cacontent, indicating that the orbital order of the Mn ions is affected in the same way by the application of anexternal pressure and by the chemical pressure.