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Evidence of the impurity spin coupling with quantum paraelectric fluctuations in CaTi1-xRuxO3 | Ivica M. Bradarić
; Feodor V. Kusmartsev
; | Date: |
5 Aug 2019 | Abstract: | Quantum paraelectrics are materials in which a long-range
ferroelectric/antiferroelectric order is suppressed by quantum fluctuations,
i.e. zero-point motion of the lattice prevents condensation of the soft polar
phonon mode even at T = 0 K. The most prominent quantum paraelectric materials
are SrTiO3, KTaO3, and CaTiO3. Here we focus on peculiar properties of the
pseudo-cubic perovskite CaTi1-xRuxO3 system. Namely, as soon as any
concentration of either Ru or Ti is introduced into the pure compounds, a
concentration-independent ferromagnetic-like transition occurs at low
temperatures. We present the experimental evidence of the spin-polarized ground
state of CaTi1-xRuxO3 induced by coupling of magnetic moments of Ru impurities
with quantum paraelectric fluctuations in the host compound CaTiO3. | Source: | arXiv, 1908.1631 | Services: | Forum | Review | PDF | Favorites |
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