Vibrating Sample/Alternating Gradient Magnetometer (VSM/AGM) System

磁性在帮助理解地质物质的起源和后来的历史上是非常有用的。许多磁性能（居里温度等）有助于对每种磁性矿物进行独特识别。此外，这些相同的性能对成分/氧化态、应变（压力）、尺寸和形状都很敏感。在解释地球和行星科学中通常遇到的复杂系统时，这些参数的知识是至关重要的。为了充分提取这一信息，通常需要测量小样品（<50 mm）在可变外加磁场下的磁化强度，在很宽的温度范围（-269°C至800°C）和不同的气氛（空气、氩气等）下的磁化强度。最灵敏、通用、易于使用的市售仪器是振动样品磁强计和交变梯度磁强计（VSM+AGM）的组合。我们想购买的就是这种组合式仪器。执行复杂的磁性表征的需求不仅对地球物理学的磁性组很重要，而且涉及到LMU地球与环境科学系的所有五个部门的研究，以及LMU-微生物学和TUM核天体物理学的合作伙伴。这一工具将大大增强我们开展广泛的正在进行的研究的能力。

Magnetic properties are extremely useful to help understand the genesis and subsequent history of geomaterials. A number of magnetic properties (Curie temperature, etc.) facilitate the unique identification of each magnetic mineral. Moreover, these same properties are sensitive to composition/oxidation state, strain (pressure), size and shape. Knowledge of these Parameters is crucial when interpreting complex Systems typically encountered in the Earth and planetary sciences. To fully extract this Information, one often needs to measure the magnetizations of small (<50 mm ) samples under variable applied magnetic fields, under a wide range of temperatures (-269°C to 800°C) and in different atmospheres (air, argon, etc.). The most sensitive, versatile, easy to use, commercially-available instrument to carry out such work is a combination of vibrating sample magnetometer and alternating gradient magnetometer (VSM+AGM). It is this combined instrument we wish to purchase. The need to perform sophisticated magnetic characterization is important not only to the Magnetism Group in Geophysics, but touches on the research of all five sections in the Earth andEnvironmental Sciences Department at LMU, as well as collaboration partners at LMU-Microbiology and TUM Nuclear Astrophysics. This instrument would significantly augment our capabilities to carry out a wide range of on-going research.