PPMS Dynacool
This is one of the main devices in our laboratory, and is used for magnetization and magnetostriction measurements. Using this device, we have measured the magnetization of LaCoO3 and La(Sr,Co)O3, and are investigating the origin of the spin state transition of cobalt ions and the magnetic shape memory effect. We are also using this device to conduct detailed research into the appearance of magnetism through cobalt doping in In2O3 and In(Al)2O3.
The maximum magnetic field is 9 T, and the temperature can be set to between 2 and 400 K. For magnetization measurements, the temperature can be set to a maximum of 1000 K.
This is a sample holder for magnetization measurements.
This is a measurement pack for measuring direct current resistance.
Infrared Concentrated Heating Furnace
The infrared concentration heating furnace is a device used to grow single crystals using the floating zone melting method. Four elliptical mirrors are used to focus the light from the light source (halogen lamp) to create a high-temperature zone, and the sample is placed at the focal point to melt. The molten part of the sample is held in the air by surface tension. By moving this part, it is possible to grow a single crystal by simultaneously melting and solidifying. Because the molten part is held in the air, it is difficult for impurities to mix in, and this is a feature that makes it possible to grow high-quality single crystals.
The LaCoO3 and La(Sr,Co)O3 single crystals grown using this device are used for magnetostriction and magnetization measurements, and are indispensable samples for research into spin state transitions and magnetic shape memory effects. In addition, single crystals of TiO2 and green sapphire are grown using this device for the modern physics classes in the graduate school.
Device appearance
Elliptical mirror and halogen lamp
Green Sapphire
LaCoO3
TiO2
electric furnace
It is used for heating samples, creating polycrystals, and growing single crystals using the flux method.
This is an electric furnace that can be used at 1400℃ on a regular basis and heated up to 1500℃. It can be heated in an oxygen flow.
It is used for heating samples, creating polycrystals, and growing single crystals using the flux method. When investigating the appearance of magnetism through cobalt doping in In2O3 and In(Al)2O3, we use this electric furnace to synthesize the samples. We also use this device to create polycrystalline samples of LaCoO3 and La(Sr,Co)O3.
This is an electric furnace that can be used at 1250℃ continuously and heated up to 1300℃. Oxygen flow is also possible.
Scanning electron microscope
This equipment can be used for magnified observation of samples and composition analysis using energy dispersive X-ray analysis. When investigating the appearance of magnetism through cobalt doping in In2O3 and In(Al)2O3, the distribution of cobalt is checked using this equipment. It is also used to evaluate the quality of single crystals and polycrystals of LaCoO3 and La(Sr,Co)O3. In the Department of Advanced Physics, students use it to observe the condition of the cuticle of their own hair.
Raman spectroscopy
This is a device that can measure Raman scattering. It is also equipped with a refrigerator, and can be cooled to 10 K. We use it to investigate the vibrational states of materials. We are studying in detail the changes in lattice vibrations accompanying spin state transitions in LaCoO3 and La(Sr,Co)O3 using this device. We are also investigating the effects of cobalt doping on lattice vibrations in In2O3 and In(Al)2O3. Because it is possible to perform low-temperature measurements, this device is important for studying temperature-dependent changes in spin states.
