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<p>Electrical control of magnetic order remains one of the fundamental pursuits in condensed matter physics and spintronics, offering transformative potential for energy-efficient, high-density information technologies. While current-induced switching via spin-transfer and spin-orbit torques is well established in ferromagnets, electrically driving a transition between distinct magnetic phases, specifically from a ferromagnetic to an antiferromagnetic state, remains largely unexplored experimentally. Here, we demonstrate a reversible, electrically-driven inverse metamagnetic transition in an epitaxial thin film of the correlated manganite Sm<sub><i>1-x</i></sub>Sr<sub><i>x</i></sub>MnO₃. Above a critical current threshold, the system abruptly switches from a low-resistance ferromagnetic state to a high-resistance antiferromagnetic-like phase. We exploit this phenomenon in nanoscale (250 × 250 nm²) spin-filter tunnel junctions based on LaNiO<i>₃</i>/Sm<i>₀.₇₅</i>Sr<i>₀.₂₅</i>MnO<i>₃</i>/ SrTiO<i>₃</i>/La<i>₀.₇</i>Sr<i>₀.₃</i>MnO<i>₃</i> heterostructures, realizing robust, bistable resistance switching with unconventional magnetoresistance exceeding 200 %, tunable by current, temperature, and magnetic field. These findings open a phase-transition-based route for electrically driven spintronic devices beyond conventional torque-based strategies.</p>

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Electrically driven inverse metamagnetic transition in Sm1-xSrxMnO₃

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月25日

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  • Suryakanta Mondal,
  • Vinod Kumar,
  • Sourav Chowdhury,
  • Akshat Godha,
  • Arup Kumar Mandal,
  • Wan-Sheng Tang,
  • Alan Kalitsov,
  • Ashish Omar,
  • Subhajit Nandy,
  • Jayjit Kumar Dey,
  • Gyanendra Panchal,
  • Surendra Kumar Makineni,
  • Julia Mundy,
  • Yu-Hui Tang,
  • Sasikanth Manipatruni,
  • Manuel Bibes,
  • Mark Blamire,
  • Bhagwati Prasad

摘要

Electrical control of magnetic order remains one of the fundamental pursuits in condensed matter physics and spintronics, offering transformative potential for energy-efficient, high-density information technologies. While current-induced switching via spin-transfer and spin-orbit torques is well established in ferromagnets, electrically driving a transition between distinct magnetic phases, specifically from a ferromagnetic to an antiferromagnetic state, remains largely unexplored experimentally. Here, we demonstrate a reversible, electrically-driven inverse metamagnetic transition in an epitaxial thin film of the correlated manganite Sm1-xSrxMnO₃. Above a critical current threshold, the system abruptly switches from a low-resistance ferromagnetic state to a high-resistance antiferromagnetic-like phase. We exploit this phenomenon in nanoscale (250 × 250 nm²) spin-filter tunnel junctions based on LaNiO₃/Sm₀.₇₅Sr₀.₂₅MnO₃/ SrTiO₃/La₀.₇Sr₀.₃MnO₃ heterostructures, realizing robust, bistable resistance switching with unconventional magnetoresistance exceeding 200 %, tunable by current, temperature, and magnetic field. These findings open a phase-transition-based route for electrically driven spintronic devices beyond conventional torque-based strategies.