THE HERMENEUTICAL RECEPTION OF THE CHARACTER OF JORGE DE BURGOS IN UMBERTO ECO\u27S NOVEL "THE NAME OF THE ROSE"

U članku se analiziraju modaliteti Ecova intertekstualnog prisvajanja fikcionalne osobe J.L. Borgesa i pojedinih književnih metafora koje se razvijaju u njegovim pripovijetkama u izgradnji hermeneutičke recepcije lika Jorgea iz Burgosa, glavnog negativca romana Ime ruže Umberta Eca. Dok je prvi aspekt dostatno obrađen u kritičkoj literaturi o Imenu ruže, drugi je ostao zanemaren u nekim bitnim aspektima. Analiza ideoloških i hermeneutičkih aspekata njegovog lika u Ecovu romanu otkriva da u izgradnji ne samo njegova etičkog i teološkog habitusa nego i razvitku glavnog narativnog tijeka romana, čiji je on pokretač, veliku ulogu igraju dvostruko kodirane metafore koje Borges razvija u svojim pripovijetkama Teolozi i Tri tumačenja Jude. U članku se analizira njihova uloga u spomenutim Borgesovim novelama i njihov intertekstualni odjek u Imenu ruže koji se pronalazi na idejnoj i kompozicijsko-pripovjednoj razini. Temeljna Borgesova metafora \u27svi su ljudi jedan čovjek\u27 razrađuje se u romanu raznim figurama ponavljanja, a unutar te primarne metafore značajna je metaforika Jude koju Borges razvija u noveli Tri tumačenja Jude. Analiza hermeneutičke recepcije Jorgeova lika otkriva presudnu ulogu te metafore u njenoj iozgradnji.This article analyses the modalities of Umberto Eco\u27s intertextual adoption of J. L. Borges\u27 \u27fictional person\u27 and the specific literary metaphors Borges developed and used in his short stories when building the hermeneutical reception of the character of Jorge de Burgos, the villain of Eco\u27s novel The Name of the Rose. While the critical literature on The Name of the Rose has devoted considerable attention to the former, the latter has remained neglected in some crucial aspects. The analysis of ideological and hermeneutic aspects of his character in Eco\u27s novel revealed that, in creating his ethical and theological habitus and even in the development of the novel\u27s main narrative, a significant role was played by double coded metaphors developed by Borges in his short stories The Theologians and Three Versions of Judas. This article analyses their role in the aforementioned short stories by Borges and their intertextual resonance in The Name of the Rose visible both, on the level of ideas and the compositional-narrative level. The basic Borges\u27 metaphor, "Whatever one man does, it is as if all men did it", was developed in the novel with the help of various figures of repetition. Within that primary metaphor, an important place is held by the metaphorics of Judas developed by Borges in Three Versions of Judas. Analysis of the hermeneutical reception of Jorge\u27s character has revealed the crucial role of that metaphor in its creation

Complex Evolution of Built-in Potential in Compositionally-Graded PbZr_1–<i>x</i>Ti_<i>x</i>O₃ Thin Films

Epitaxial strain has been widely used to tune crystal and domain structures in ferroelectric thin films. New avenues of strain engineering based on varying the composition at the nanometer scale have been shown to generate symmetry breaking and large strain gradients culminating in large built-in potentials. In this work, we develop routes to deterministically control these built-in potentials by exploiting the interplay between strain gradients, strain accommodation, and domain formation in compositionally graded PbZr_1–<i>x</i>Ti_<i>x</i>O₃ heterostructures. We demonstrate that variations in the nature of the compositional gradient and heterostructure thickness can be used to control both the crystal and domain structures and give rise to nonintuitive evolution of the built-in potential, which does not scale directly with the magnitude of the strain gradient as would be expected. Instead, large built-in potentials are observed in compositionally-graded heterostructures that contain (1) compositional gradients that traverse chemistries associated with structural phase boundaries (such as the morphotropic phase boundary) and (2) ferroelastic domain structures. In turn, the built-in potential is observed to be dependent on a combination of flexoelectric effects (<i>i.e.</i>, polarization–strain gradient coupling), chemical-gradient effects (<i>i.e.</i>, polarization–chemical potential gradient coupling), and local inhomogeneities (in structure or chemistry) that enhance strain (and/or chemical potential) gradients such as areas with nonlinear lattice parameter variation with chemistry or near ferroelastic domain boundaries. Regardless of origin, large built-in potentials act to suppress the dielectric permittivity, while having minimal impact on the magnitude of the polarization, which is important for the optimization of these materials for a range of nanoapplications from vibrational energy harvesting to thermal energy conversion and beyond

Nonstoichiometry, Structure, and Properties of BiFeO₃ Films

We explore the effect of growth conditions on the cation and anion chemistry, electrical leakage, conduction mechanisms, and ferroelectric and dielectric behavior of BiFeO₃. Although it is possible to produce single-phase, coherently strained films in all cases, small variations in the pulsed-laser deposition growth process, specifically the laser repetition rate and target composition, result in films with chemistries ranging from 10% Bi-deficiency to 4% Bi-excess and films possessing Bi gradients as large a 6% across the film thickness. Corresponding variations and gradients in the O chemistry are also observed. As a result of the varying film chemistry, marked differences in surface and domain morphology are observed wherein Bi-deficiency stabilizes atomically smooth surfaces and ordered stripe domains. Subsequent investigation of the current–voltage response reveals large differences in leakage current density arising from changes in both the overall stoichiometry and gradients. In turn, the film stoichiometry drives variations in the dominant conduction mechanism including examples of Schottky, Poole–Frenkel, and modified Poole–Frenkel emission depending on the film chemistry. Finally, slightly Bi-excess films are found to exhibit the best low-frequency ferroelectric and dielectric response while increasing Bi-deficiency worsens the low-frequency ferroelectric performance and reduces the dielectric permittivity

180° Ferroelectric Stripe Nanodomains in BiFeO₃ Thin Films

There is growing evidence that domain walls in ferroics can possess emergent properties that are absent in the bulk. For example, 180° ferroelectric domain walls in the ferroelectric-antiferromagnetic BiFeO₃ are particularly interesting because they have been predicted to possess a range of intriguing behaviors, including electronic conduction and enhanced magnetization. To date, however, ordered arrays of such domain structures have not been reported. Here, we report the observation of 180° stripe nanodomains in (110)-oriented BiFeO₃ thin films grown on orthorhombic GdScO₃ (010)_O substrates and their impact on exchange coupling to metallic ferromagnets. Nanoscale ferroelectric 180° stripe domains with {112̅} domain walls were observed in films <32 nm thick. With increasing film thickness, we observed a domain structure crossover from the depolarization field-driven 180° stripe nanodomains to 71° ferroelastic domains determined by the elastic energy. These 180° domain walls (which are typically cylindrical or meandering in nature due to a lack of strong anisotropy associated with the energy of such walls) are found to be highly ordered. Additional studies of Co_0.9Fe_0.1/BiFeO₃ heterostructures reveal exchange bias and exchange enhancement in heterostructures based on BiFeO₃ with 180° domain walls and an absence of exchange bias in heterostructures based on BiFeO₃ with 71° domain walls; suggesting that the 180° domain walls could be the possible source for pinned uncompensated spins that give rise to exchange bias. This is further confirmed by X-ray circular magnetic dichroism studies, which demonstrate that films with predominantly 180° domain walls have larger magnetization than those with primarily 71° domain walls. Our results could be useful to extract the structure of domain walls and to explore domain wall functionalities in BiFeO₃

Reducing Coercive-Field Scaling in Ferroelectric Thin Films <i>via</i> Orientation Control

The desire for low-power/voltage operation of devices is driving renewed interest in understanding scaling effects in ferroelectric thin films. As the dimensions of ferroelectrics are reduced, the properties can vary dramatically, including the robust scaling relationship between coercive field (<i>E</i>_c) and thickness (<i>d</i>), also referred to as the Janovec–Kay–Dunn (JKD) law, wherein <i>E</i>_c ∝ <i>d</i>^–2/3. Here, we report that whereas (001)-oriented heterostructures follow JKD scaling across the thicknesses range of 20–330 nm, (111)-oriented heterostructures of the canonical tetragonal ferroelectric PbZr_0.2Ti_0.8O₃ exhibit a deviation from JKD scaling wherein a smaller scaling exponent for the evolution of <i>E</i>_c is observed in films of thickness ≲ 165 nm. X-ray diffraction reveals that whereas (001)-oriented heterostructures remain tetragonal for all thicknesses, (111)-oriented heterostructures exhibit a transition from tetragonal-to-monoclinic symmetry in films of thickness ≲ 165 nm as a result of the compressive strain. First-principles calculations suggest that this symmetry change contributes to the deviation from the expected scaling, as the monoclinic phase has a lower energy barrier for switching. This structural evolution also gives rise to changes in the <i>c</i>/<i>a</i> lattice parameter ratio, wherein this ratio increases and decreases in (001)- and (111)-oriented heterostructures, respectively, as the films are made thinner. In (111)-oriented heterostructures, this reduced tetragonality drives a reduction of the remanent polarization and, therefore, a reduction of the domain-wall energy and overall energy barrier to switching, which further exacerbates the deviation from the expected scaling. Overall, this work demonstrates a route toward reducing coercive fields in ferroelectric thin films and provides a possible mechanism to understand the deviation from JKD scaling

Thickness-Dependent Crossover from Charge- to Strain-Mediated Magnetoelectric Coupling in Ferromagnetic/Piezoelectric Oxide Heterostructures

Magnetoelectric oxide heterostructures are proposed active layers for spintronic memory and logic devices, where information is conveyed through spin transport in the solid state. Incomplete theories of the coupling between local strain, charge, and magnetic order have limited their deployment into new information and communication technologies. In this study, we report direct, local measurements of strain- and charge-mediated magnetization changes in the La_0.7Sr_0.3MnO₃/PbZr_0.2Ti_0.8O₃ system using spatially resolved characterization techniques in both real and reciprocal space. Polarized neutron reflectometry reveals a graded magnetization that results from both local structural distortions and interfacial screening of bound surface charge from the adjacent ferroelectric. Density functional theory calculations support the experimental observation that strain locally suppresses the magnetization through a change in the Mn-e_g orbital polarization. We suggest that this local coupling and magnetization suppression may be tuned by controlling the manganite and ferroelectric layer thicknesses, with direct implications for device applications