期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 310, 期 2, 页码 E355-E357出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2006.10.334
关键词
multiferroic; magneto-electric coupling; polarization/ferroelectric effect
We synthesized a series of TbFexMn2-xO5 (0 <= X <= 0.2) samples and studied the effect of the Fe-doping on their magnetic properties. X-ray diffraction patterns indicate a pure orthorhombic structure with space group Pbam for all the samples. Based on the data of temperature- and field-dependent magnetization, M(T) and M(H) curves, it is found that the magnetic moment enhances with increase in the Fe-content in TbMn2O5. With increase in the Fe-content from 0 to 0.2, the magnetic moment increases progressively from 0.014 to 0.030 mu(Bohr) p.f.u. at room temperature (RT). Particularly for the TbFe0.2Mn1.8O5 sample, a current-voltage curve displays a nonlinear behavior at RT. If a strong coupling between magnetic moment and electric polarization exists, the Fe-doped sample may have a higher polarization/ferroelectric effect, which should be a great advantage for the future application of the spintronics devices. (c) 2006 Elsevier B.V. All rights reserved.
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