Anomalous magnetostrictive effects in (La1-xTbx)2/3S1/3MnO3
Wu Jian (吴坚)ab, Zhang Shi-Yuan (张世远)a
a National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China; b Department of Mathematics and Physics, Hehai University, Nanjing 210098, China
Abstract A series of (La1-xTbx)2/3Sr1/3MnO3 polycrystalline samples has been studied by means of x-ray diffraction, magnetostriction, and thermal expansion measurements. It has been found that this series undergoes a phase transition from a rhombohedral to an orthorhombic form at the doping level x≈0.20 at room temperature accompanied by an anisotropic magnetostriction up to $－50×10^{-6}$ under a magnetic field of 1T. The linear and volume magnetostrictions vary with chemical composition, even change sign. At T=80K, the magnetostrictions for the samples of x=0.20 and 0.40 exhibit different behaviours. The sample of x=0.20 has positive volume and linear magnetostrictions and a negative anisotropic magnetostriction, while the sample of x=0.40 has an opposite behaviour. The magnitude of volume magnetostriction for both the samples is essential ($\sim10^{-4}$) at T=80K under a magnetic field of 4T. We conclude that these anomalous effects are due to the charge delocalization and the structural phase transition between orthorhombic and rhombohedral forms induced by the applied magnetic field.
Received: 06 November 2002
Revised: 22 January 2003
Accepted manuscript online:
Fund: Project supported by the National Key Project for Basic Research (Grant No G1999064508) and the Natural Science Foundation of China (Grant No 19890310(4)).
Cite this article:
Wu Jian (吴坚), Zhang Shi-Yuan (张世远) Anomalous magnetostrictive effects in (La1-xTbx)2/3S1/3MnO3 2003 Chinese Physics 12 792
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
