Ultrasensitive magnetostrictive responses at the pre-transitional rhombohedral side of ferromagnetic morphotropic phase boundary

Cheng Chao Hu, Zhao Zhang, Xiao Xing Cheng, Hou Bing Huang, Yang Guang Shi, Long Qing Chen

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Abstract: The morphotropic phase boundary (MPB) has been utilized extensively in ferroelectrics and recently been extended to ferromagnets, especially for the magnetostrictive materials. Here, guided by phenomenological theories and phase-field simulations, we proposed a design strategy for obtaining the ultrasensitive magnetoelastic response at the pre-transitional rhombohedral side of ferromagnetic MPB, by further flattening the energy landscape while maintaining large intrinsic magnetostriction. To validate this, we judiciously introduced the light-rare-earth-based Tb0.1Pr0.9 system to the Co-doped Tb0.27Dy0.73Fe2 alloy, as Tb0.1Pr0.9 is an anisotropy compensation system with large intrinsic strains and the transition metal dopant of Co tends to optimize the magnetostriction. Phase-field modeling was used to determine the detailed magnetic domain evolution of the investigated multi-component Laves phase compounds, the results of which were compared with experimental results. At room temperature, an ultrahigh magnetoelastic response d33 was found in Tb0.253Dy0.657Pr0.09(Fe0.9Co0.1)2 recompensation system especially at low fields, which is superior to that of the commercial Tb0.27Dy0.73Fe2 (Terfenol-D) polycrystal. The ultrahigh magnetostrictive sensitivity, together with low raw material cost makes it one of the strongest candidates for magnetostriction applications. Graphic abstract: [Figure not available: see fulltext.]

Original languageEnglish (US)
Pages (from-to)1713-1729
Number of pages17
JournalJournal of Materials Science
Volume56
Issue number2
DOIs
StatePublished - Jan 1 2021

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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