Details

Autor(en) / Beteiligte

• Li, Lin
• Zhou, Changrong
• Zheng, Yuanlei
• Du, Yusong
• Yuan, Changlai
• Ma, Lei
• Zhao, Jingtai
• Rao, Guanghui

Titel

Thickness-dependent ferromagnetic, ferroelectric, and energy storage performances of (Bi0.5Na0.5)0.94Ba0.06TiO3/La0.67Sr0.33MnO3 composite films by pulsed laser deposition

Ist Teil von

• Journal of materials science. Materials in electronics, 2023-02, Vol.34 (5), Article 384

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Multiferroic composite films based on ferroelectric (Bi 0.5 Na 0.5 ) 0.94 Ba 0.06 TiO 3 (BNT-6BT) and ferromagnetic La 0.67 Sr 0.33 MnO 3 (LSMO) were fabricated on Pt(111)/Ti/SiO 2 /Si(100) substrates by pulsed laser deposition. The effects of LSMO thickness on microstructure, magnetic characteristics, dielectric behavior, and energy storage performances have been investigated in detail. Compared with the pure BNT-6BT film, BNT-6BT/LSMO( t ) composite films with polycrystalline structure exhibit larger dielectric constant, slimmer hysteresis loop, and lower remnant polarization. Meanwhile, the magnetization and polarization of composite films weaken with the increase of LSMO thickness due to the influence of crystalline size and the strain gradient field in the films induced by lattice mismatch. Optimized saturation magnetization of 120 emu/cm 3 at 300 K for BNT-6BT/LSMO(200 nm) film and energy storage density and efficiency under 400 kV/cm of 4.05 J/cm 3 and 69.8% for BNT-6BT/LSMO(400 nm) film are obtained, respectively. In addition, BNT-6BT/LSMO(400 nm) film manifests superior frequency stability (500-10 k Hz) and strong anti-fatigue stabilities (10 8 cycles). The results provide an effective way to systematically design multifunctional film capacitors.