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- W4367312526 abstract "We studied ${mathrm{Ni}}_{50+x}{mathrm{Ti}}_{50ensuremath{-}x}$ with compositions up to $x=2$, performing $^{47}mathrm{Ti}$ and $^{49}mathrm{Ti}$ nuclear magnetic resonance (NMR) measurements from 4 to 400 K. For large $x$ in this system, a strain glass appears in which frozen ferroelastic nanodomains replace the displacive martensite structural transition. Here, we demonstrate that NMR can provide an extremely effective probe of the strain-glass freezing process, with large changes in NMR line shape due to the effects of random strains which become motionally narrowed at high temperatures. At the same time with high-resolution x-ray diffraction we confirm the lack of structural changes in $xensuremath{ge}1.2$ samples, while we show that there is little change in the electronic behavior across the strain-glass freezing temperature. NMR spin-lattice relaxation time (${T}_{1}$) measurements provide a further measure of the dynamics of the freezing process, and indicate a predominantly thermally activated behavior both above and below the strain-glass freezing temperature. We show that the strain-glass results are consistent with a very small density of critically divergent domains undergoing a Vogel-Fulcher-type freezing process, coexisting with domains exhibiting faster dynamics and stronger pinning." @default.
- W4367312526 created "2023-04-29" @default.
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- W4367312526 date "2023-04-28" @default.
- W4367312526 modified "2023-10-16" @default.
- W4367312526 title "NMR study of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi mathvariant=normal>Ni</mml:mi><mml:mrow><mml:mn>50</mml:mn><mml:mo>+</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant=normal>Ti</mml:mi><mml:mrow><mml:mn>50</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:math> strain glasses" @default.
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- W4367312526 doi "https://doi.org/10.1103/physrevb.107.144207" @default.
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