paramagnetic substance

简明释义

顺磁性物质

英英释义

例句

1.Iron is a well-known paramagnetic substance, especially in its oxidized form.

铁是一种众所周知的顺磁性物质，特别是在其氧化形式下。

2.In the laboratory, scientists often use paramagnetic substances to study electron configurations.

在实验室中，科学家们常常使用顺磁性物质来研究电子配置。

3.The presence of a paramagnetic substance can affect the relaxation times in MRI scans.

在MRI扫描中，顺磁性物质的存在可以影响弛豫时间。

4.A typical example of a paramagnetic substance is oxygen, which exhibits magnetic properties when exposed to a magnetic field.

氧气是一个典型的顺磁性物质，在施加磁场时会表现出磁性。

5.When cooled to low temperatures, some paramagnetic substances can exhibit stronger magnetic properties.

当冷却到低温时，一些顺磁性物质可以表现出更强的磁性。

作文

In the realm of physics and materials science, understanding the properties of different substances is crucial for various applications. One such category of materials is known as a paramagnetic substance. A paramagnetic substance is characterized by its ability to be attracted by an external magnetic field. Unlike ferromagnetic materials, which can retain their magnetization after the external field is removed, paramagnetic substances only exhibit magnetism in the presence of an external magnetic field. This unique property stems from the presence of unpaired electrons in the atomic or molecular structure of these substances.The behavior of paramagnetic substances can be explained through the principles of quantum mechanics. When exposed to a magnetic field, the unpaired electrons align themselves with the direction of the field, resulting in a net magnetic moment. However, this alignment is temporary; once the external magnetic field is removed, the thermal motion of the atoms causes the magnetic moments to randomize, leading to the loss of magnetization.Examples of paramagnetic substances include aluminum, platinum, and certain metal ions like iron(III) and manganese. These materials find applications in various fields, including magnetic resonance imaging (MRI), where paramagnetic substances are used as contrast agents to enhance the quality of images. Additionally, they are utilized in the development of magnetic sensors and data storage devices.The study of paramagnetic substances is not only limited to practical applications but also extends to fundamental research in physics. Scientists investigate the magnetic properties of these materials to gain insights into electron behavior, bonding, and molecular structures. For instance, the temperature dependence of the magnetization in paramagnetic substances follows Curie's law, which states that the magnetic susceptibility is inversely proportional to the temperature. This relationship provides valuable information about the interactions between electrons and the overall electronic structure of the material.Moreover, paramagnetic substances play a significant role in the field of chemistry, particularly in coordination chemistry. Many transition metal complexes exhibit paramagnetic behavior due to the presence of unpaired d-electrons. Understanding the paramagnetic nature of these complexes can help chemists design new materials with specific magnetic properties, which can be beneficial in catalysis and other chemical processes.In conclusion, paramagnetic substances are fascinating materials that exhibit unique magnetic properties due to the presence of unpaired electrons. Their ability to respond to external magnetic fields has led to numerous applications in medicine, technology, and scientific research. By studying these materials, researchers can uncover new phenomena related to magnetism and electron behavior, further advancing our understanding of the physical world. As we continue to explore the properties and potential applications of paramagnetic substances, we open up new avenues for innovation and discovery in various scientific disciplines.

在物理学和材料科学的领域中，理解不同物质的特性对各种应用至关重要。其中一个材料类别被称为顺磁性物质。顺磁性物质的特点是能够被外部磁场吸引。与能够在去除外部磁场后保持其磁化的铁磁材料不同，顺磁性物质仅在外部磁场存在时表现出磁性。这种独特的性质源于这些物质的原子或分子结构中存在未成对电子。顺磁性物质的行为可以通过量子力学的原理来解释。当暴露于磁场中时，未成对电子会与磁场方向对齐，从而产生净磁矩。然而，这种对齐是暂时的；一旦去除外部磁场，原子的热运动会导致磁矩随机化，从而导致磁性的丧失。顺磁性物质的例子包括铝、铂以及某些金属离子如铁(III)和锰。这些材料在多个领域中都有应用，包括磁共振成像（MRI），其中顺磁性物质被用作对比剂以增强图像质量。此外，它们还用于磁传感器和数据存储设备的发展。对顺磁性物质的研究不仅限于实际应用，还扩展到物理学的基础研究。科学家们研究这些材料的磁性，以深入了解电子行为、键合和分子结构。例如，顺磁性物质中磁化强度的温度依赖性遵循居里定律，该定律指出磁化率与温度成反比。这种关系提供了有关电子之间相互作用和材料整体电子结构的重要信息。此外，顺磁性物质在化学领域中也发挥着重要作用，特别是在配位化学中。许多过渡金属络合物由于存在未成对的d电子而表现出顺磁性行为。理解这些络合物的顺磁性特性可以帮助化学家设计具有特定磁性特征的新材料，这在催化和其他化学过程中可能是有益的。总之，顺磁性物质是迷人的材料，由于存在未成对电子，表现出独特的磁性。它们对外部磁场的响应能力使其在医学、技术和科学研究中有众多应用。通过研究这些材料，研究人员可以揭示与磁性和电子行为相关的新现象，进一步推动我们对物理世界的理解。随着我们继续探索顺磁性物质的特性和潜在应用，我们为各个科学学科的创新和发现开辟了新的途径。