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TbMn₂O<SUB>5</SUB> 박막의 합성과 증착 온도에 따른 결정 구조 및 자성 특성 변화
곽용수(Yongsu Kwak),송종현(Jonghyun Song),이두표(Doopyo Lee) 한국자기학회 2020 韓國磁氣學會誌 Vol.30 No.1
We grew TbMn₂O<SUB>5</SUB> thin films on Nb doped TiO₂(110) substrates at different temperatures and studied the influence of growth temperature on their physical properties. When the growth temperature was 700℃, the preferred crystal orientation perpendicular to the film surface was TbMn₂O<SUB>5</SUB>(002) whereas it was turned to (211) with increasing the growth temperature to 950℃. For the sample with the growth temperature of 750℃, the domains with the crystal orientations of TbMn₂O<SUB>5</SUB>(002) and TbMn₂O<SUB>5</SUB>(211) were mixed. For magnetic properties, the phase transition from paramagnetic to ferromagnetic was observed at about 43K for all samples studied. However, the larger the coercive field and magnetic hysteresis were observed with decreasing the growth temperature. These observations indicate that the growth temperature is an important parameter in determining the crystal orientation and magnetic property of TbMn₂O<SUB>5</SUB> thin film.