Temperature dependence of the structure and energy of domain walls in a first-order ferroelectric

Foeth, M; Stadelmann, PA; Robert, Marc

doi:10.1016/j.physa.2006.05.042

Cited by 10 publications

(11 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other previous work has researched various aspects of domain behavior as a function of temperature in BaTiO 3 30-32 and PbTiO 3 . 33 The work presented in this article is largely consistent with the research discussed above, but with some important differences: atomic force microscopy has been used to map the behavior of 90 • stripe domains in bulk tetragonal BaTiO 3 as a function of temperature with more modern, temperature-stable apparatus than was widely available previously. On heating, no change in domain configuration or periodicity was found until within ∼2 • C of T C .…”

Section: Introductionsupporting

confidence: 62%

Domain annihilation due to temperature and thickness gradients in single-crystal BaTiO3

et al. 2012

View full text Add to dashboard Cite

Section: Introductionsupporting

confidence: 62%

Domain annihilation due to temperature and thickness gradients in single-crystal BaTiO3

et al. 2012

View full text Add to dashboard Cite

“…The resulting increase in domain wall density causes the observed maximum in the permittivity. 42 In other words, even though the macroscopic domain structure decays at T d , the coherence of the dipoles within the domains does not. Instead, it extends slightly into the region of the unpoled sample.…”

Section: Discussionmentioning

confidence: 99%

Influence of electric fields on the depolarization temperature of Mn-doped (1-x)Bi1/2Na1/2TiO3-xBaTiO3

Sapper¹,

Schaab²,

Jo³

et al. 2012

Journal of Applied Physics

136

107

View full text Add to dashboard Cite

Articles you may be interested inElectric-field-temperature phase diagram of the ferroelectric relaxor system (1−x)Bi1/2Na1/2TiO3−xBaTiO3 doped with manganese J. Appl. Phys. 115, 194104 (2014) . Temperature-dependent permittivity e 0 (T) and thermally stimulated depolarization currents (TSDC) of poled samples were measured under identical heating conditions to clarify the depolarization mechanism. In both methods, the influence of electric bias fields on the transition temperature was investigated. Fields applied in the poling direction shift the transition to higher temperatures, with corresponding results in e 0 (T) and TSDC measurements. While the response of transition temperature to external fields displays a similar trend in all investigated compositions, the shape of TSDC is clearly connected with the composition and, hence, the crystal symmetry of the sample. Furthermore, the comparison of e 0 (T) and TSDC data reveals a systematic shift between transition temperatures obtained with the two different methods.;

show abstract

“…This effect is important for the understanding of the DW motion in nanostructures [49,50]. It is a general phenomenon for DWs, including ferroelectric ones [51]. For sample C, the mean DW width L o (T ) is estimated to 31 nm at 0 K and increases by 6% at T b .…”

Section: Thermal Softening Of Anisotropymentioning

confidence: 95%

Magnetoelastic effects and random magnetic anisotropy in highly strained ultrathin Ni nanowires epitaxied in a SrTiO3 matrix

Weng

Hennes

Hrabovský³

et al. 2020

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

We analyze the magnetic anisotropy of Ni nanowires with diameters smaller than 5 nm. The nanowires are vertically epitaxied in a SrTiO 3 (001) matrix which generates huge tensile strains up to 3.6% along the nanowire axis. This leads to an unusual anisotropy, characterized by an easy magnetization plane perpendicular to the nanowire axis. Hysteresis cycles M(H) unveil an overall in-plane isotropy, while an opening of the M(H) cycles and thermal activation measurements indicate the presence of local energy barriers inside the nanowires. Surprisingly, the coercive field H c (T) decays exponentially with increasing temperature, for both the easy plane and the hard axis. Based on these findings, we provide an analysis of magnetoelastic effects in the nanowires. By considering global averaging over the anisotropy distribution and local averaging according to the Random Magnetic Anisotropy model, we find that the global anisotropy, with its hard axis and isotropic easy plane, is related to the mean strain, while coercivity arises from local strain variations. We evidence that a thermally activated anisotropy softening occurs in the nanowires, in addition to Sharrock's law of thermal reduction of coercivity. Possible mechanisms responsible for this thermal softening of anisotropy are proposed and discussed. Our study eventually allows to identify two major competing effects at play in the present system: an increasing magnetic anisotropy with increasing strain and a reduction of the anisotropy with increasing local strain fluctuations.

show abstract

Temperature dependence of the structure and energy of domain walls in a first-order ferroelectric

Cited by 10 publications

References 12 publications

Domain annihilation due to temperature and thickness gradients in single-crystal BaTiO3

Domain annihilation due to temperature and thickness gradients in single-crystal BaTiO3

Influence of electric fields on the depolarization temperature of Mn-doped (1-x)Bi1/2Na1/2TiO3-xBaTiO3

Magnetoelastic effects and random magnetic anisotropy in highly strained ultrathin Ni nanowires epitaxied in a SrTiO3 matrix

Contact Info

Product

Resources

About