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Updated: Jul 23, 2025

Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
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可调节的人工放松剂行为在[BaTiO_{3}]_{m}/[BaZrO_{3}]_{n}超级格子中

Zishen Tian1,2, Michael Xu3, Jieun Kim1,4

  • 1Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, California 94720, USA.

Physical review letters
|July 14, 2023
PubMed
概括

研究人员使用酸/酸超级制造了人工放松剂材料. 调节层厚度控制了从铁电转向放松器行为的过渡,为纳米级极性结构提供了洞察力.

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Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis.
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Atomic Nuclei: Types of Nuclear Relaxation01:28

Atomic Nuclei: Types of Nuclear Relaxation

Nuclear relaxation restores the equilibrium population imbalance and can occur via spin–lattice or spin–spin mechanisms, which are first-order exponential decay processes.
In spin–lattice or longitudinal relaxation, the excited spins exchange energy with the surrounding lattice as they return to the lower energy level. Among several mechanisms that contribute to spin–lattice relaxation, magnetic dipolar interactions are significant. Here, the excited nucleus transfers...
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