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Toroidic phase transitions in a direct-kagome artificial spin ice.
Yue, Wen-Cheng; Yuan, Zixiong; Huang, Peiyuan; Sun, Yizhe; Gao, Tan; Lyu, Yang-Yang; Tu, Xuecou; Dong, Sining; He, Liang; Dong, Ying; Cao, Xun; Kang, Lin; Wang, Huabing; Wu, Peiheng; Nisoli, Cristiano; Wang, Yong-Lei.
Afiliación
  • Yue WC; School of Electronic Science and Engineering, Nanjing University, Nanjing, China.
  • Yuan Z; Purple Mountain Laboratories, Nanjing, China.
  • Huang P; Research Institute of Superconductor Electronics, Nanjing University, Nanjing, China.
  • Sun Y; School of Electronic Science and Engineering, Nanjing University, Nanjing, China.
  • Gao T; Purple Mountain Laboratories, Nanjing, China.
  • Lyu YY; Research Institute of Superconductor Electronics, Nanjing University, Nanjing, China.
  • Tu X; School of Electronic Science and Engineering, Nanjing University, Nanjing, China.
  • Dong S; Purple Mountain Laboratories, Nanjing, China.
  • He L; Research Institute of Superconductor Electronics, Nanjing University, Nanjing, China.
  • Dong Y; School of Electronic Science and Engineering, Nanjing University, Nanjing, China.
  • Cao X; National Key Laboratory of Spintronics, Nanjing University, Suzhou, China.
  • Kang L; School of Electronic Science and Engineering, Nanjing University, Nanjing, China.
  • Wang H; Purple Mountain Laboratories, Nanjing, China.
  • Wu P; Research Institute of Superconductor Electronics, Nanjing University, Nanjing, China.
  • Nisoli C; School of Electronic Science and Engineering, Nanjing University, Nanjing, China.
  • Wang YL; Purple Mountain Laboratories, Nanjing, China.
Nat Nanotechnol ; 19(8): 1101-1107, 2024 Aug.
Article en En | MEDLINE | ID: mdl-38684808
ABSTRACT
Ferrotoroidicity-the fourth form of primary ferroic order-breaks both space and time-inversion symmetry. So far, direct observation of ferrotoroidicity in natural materials remains elusive, which impedes the exploration of ferrotoroidic phase transitions. Here we overcome the limitations of natural materials using an artificial nanomagnet system that can be characterized at the constituent level and at different effective temperatures. We design a nanomagnet array as to realize a direct-kagome spin ice. This artificial spin ice exhibits robust toroidal moments and a quasi-degenerate ground state with two distinct low-temperature toroidal phases ferrotoroidicity and paratoroidicity. Using magnetic force microscopy and Monte Carlo simulation, we demonstrate a phase transition between ferrotoroidicity and paratoroidicity, along with a cross-over to a non-toroidal paramagnetic phase. Our quasi-degenerate artificial spin ice in a direct-kagome structure provides a model system for the investigation of magnetic states and phase transitions that are inaccessible in natural materials.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Nanotechnol Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Nanotechnol Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido