2-2 type Pb （Zro.52Tio.48）O3/CoFe204 multiferroic thin films with different thickness CoFe204 layer are fabricated by sol-gel technology. Through XRD co-scan characterization, it has been confirmed that the Pb（Zro.s2Tio.48） 03 layer in multiferroic thin films exhibits （100） texture. For the thin film with 400 nm CoFe204 layer, tetragonal- monoelinic phase transition of Pb（Zro.s2Tio.4s）O3 layer has been induced by the magnetostriction of the CoFe204 layer under 3 500 Oe magnetic field. The phase transition indicates the variation of spontaneous polarization in ferroelectric layer. Giant magneto-electric eoupling of 2-2 type multiferroic thin film will be resulted from the phase transition of Pb （Zro.52Tio.4s） O3 layer.%采用溶胶一凝胶工艺制备了2-2型Pb（Zro．52Tio．48）03／CoFe204多铁复合薄膜．通过x射线ct，扫描发现，复合薄膜中Pb（‰-52鸭．柏）03层均具有高度（100）择优取向，当复合薄膜中CoFe204层达到400砌厚时，在J＇l,~il磁场作用下，薄膜中Pb（‰．52％．48）03铁电层会发生四方相到单斜相的相变，相变的发生意味着铁电层自发极化方向的改变，这会诱发2-2型复合薄膜巨大磁电耦合效应．
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