Temperature control of local magnetic anisotropy in multiferroic CoFe/BaTiO3
Temperature control of local magnetic anisotropy in multiferroic CoFe/BaTiO3
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DOI：
10.1063/1.4795529
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发表时间：
2013-03-18
影响因子：
4
通讯作者：
van Dijken, Sebastiaan
中科院分区：
文献类型：
--
作者：
Lahtinen, Tuomas H. E.;van Dijken, Sebastiaan
本文报道了铁磁CoFe薄膜和铁电BaTiO 3衬底之间局域弹性相互作用的温度演化。偏光显微镜的测量表明，生长诱导条纹域在CoFe薄膜中保存和加强在冷却和加热过程中，通过BaTiO 3的结构相变。此外，旋转的磁易轴在四方晶系到正交晶系的过渡（T = 278 K），并在T接近380 K的同时开关的局部磁化的两个单轴域的90度。当室温铁电畴结构在温度循环后发生改变时，会引起铁磁畴图案的不可逆变化。(C)2013年美国物理学会。[http：//dx.doi.org/10.1063/1.4795529]
This paper reports on the temperature evolution of local elastic interactions between ferromagnetic CoFe films and ferroelectric BaTiO3 substrates. Polarization microscopy measurements indicate that growth-induced stripe domains in the CoFe films are preserved and strengthened during cooling and heating through the structural phase transitions of BaTiO3. Moreover, rotation of the magnetic easy axes at the tertragonal-to-orthorhombic transition (T = 278 K) and at T approximate to 380K simultaneously switches the local magnetization of both uniaxial domains by 90 degrees. Irreversible changes in the ferromagnetic domain pattern are induced when the room-temperature ferroelectric domain structure is altered after temperature cycling. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4795529]