Box Furnace

This is the most commonly used furnace in the lab. It is possible to program heating sequence up to 1,150 .

High Temperature Vertical Cylindrical Furnace for Controlling Atmosphere

This is a vertical furnace used for high temperature growth (max. 1,600 ), using a MoSi heating element.
The exhausting system is also equipped, which enables us to grow single crystals of intermetallic compounds by Flux Method in oxygen-free condition.

Atmosphere Changeable Horizontal Furnace

This is a tube type horizontal furnace that can anneal in either vacuum or any types of gas (e.g, O2 gas). Temperature is controllable up to ~ 1,550.

Floating Zone Furnace

It is also called "Infrared Traveling Solvent Molten Device". Light focused by mirror melts the polycrystals into single crystal.
The temperature of the molten can go up to as high as 2,200. Since it's not necessary to use crucibles, the impurities can hardly get in and large single crystals can be made.


Tetra-arc furnace

This is an apparatus for growing large single crystals of intermetallic compounds. Starting materials are first melted by the arc discharge from the four electrodes and pulled up slowly under high vacuum. The material is rotated to melt homogeneously.

Mono-arc Furnace

This is used for making alloys and polycrystals of intermetallic compounds.
We can melt metals by arc discharge from the single electrode from the top in argon atmosphere.

3-Zones Furnace

This is a tube type furnace that is able to control temperature in 3 zones. Single crystal growth by chemical transportation method, using temperature gradient, is possible as well.

Welding Sets

Sealing and Welding is performed here.

Centrifugal Separator

It is used to remove flux in high temperature from single crystals (made by Flux Method).

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X-ray Diffractometer@RINT-2100/PC (Rigaku)

Powder X-ray diffractometer. Composition and structural information of a powdered sample can be identified from its diffraction pattern. Low temperature measurement can be performed down to 10 K.
Maximum output: 2 kW
Current and Voltage range: 2-60 mA, and 20-60 kV
Target: Cu target is available.

Backscattering Laue X-ray Imaging System (Photonic Science)

Users can determine the orientation of single crystals with size ideally larger than 1 mm. The CCD camera (Photonic Science) provides high sensitivity and allows swift image acquisition. Goniometer with accuracy of 1 degree is available. X-ray source: RINT-2100, W target.

Imaging Plate Single Crystal X-ray Diffractometer R-AXIS RAPID II (Rigaku)

High-resolution triaxial single crystal X-ray diffractometer with a large-area, curved imaging plate detector. This system is convenient for materials development as it allows fast identification of crystal structure, lattice parameters, and orientation of small single crystals. X-ray source: Cu target.

SmartLab-LP (Rigaku)

This versatile X-ray diffractometer can be used to evaluate a wide range of materials, such as powders and thin films. It has a powerful light source of 9 kW in conjunction with a highly-sensitive detector. In addition to that, its fully-automated optical system and Guidance software ensures user-friendliness. X-ray source: Cu target.

MPMS-XL (Quantum Design)

Highly accurate, fully-automated magnetometer using a superconducting quantum interference device (SQUID).

MPMS-XL
  • Magnetic field can be applied up to +/- 7 T
  • Data can be collected in the temperature range of 1.9 K - 400 K. With the MPMS Oven option, it is possible to measure from 300 K- 800 K.
  • Closed-cycle He system, so no liquid He transfer is needed

MPMS-5S
  • Magnetic field can be applied up to +/- 5 T
  • Data can be collected in the temperature range of 1.9 K- 400 K

PPMS (Quantum Design)

Unit 01:
This instrument can automatically measure basic physical properties
of the materials such as specific heat, electrical transport property,
and thermal transport property.
By using 3He refrigerator insert, it is possible to measure down to
extremely low temperature of 0.35 K.
Operating temperature range: 0.35-300 K
Maximum magnetic field: 9 T

Units 02:
This instrument also can automatically measure basic physical properties
such as electrical transport property, thermal expansion, and Seebeck coefficient.
Operating temperature range: 2-300 K
Maximum magnetic field: 9 T

Sample Rotation Probe for PPMS (P310A)

This is a PPMS option which can rotate sample stage.
By using this, the direction of magnetic field can be varied relative to the sample.
Operating temperature range: 1.9-400 K
Rotation range: -10-370 degree
Basic step angle: 0.053 degree

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3He-4He Dilution Refrigerator Kelvinox 25 (Oxford Instruments)

You can cool down the sample down to ~35 mK and keep it for a long time (Cooling power: 25 uW at 100 mK).
This refrigerator can be inserted into the 16 T or 9 T superconducting magnet.
In this system, the resistivity, AC susceptibility and dilation (thermal expansion or magnetostriction) can be measured.
By attaching the pressure cell in the sample space (See picture), we can realize the multiple extreme condition (high pressure, high field and low temperature).

3He-4He Dilution Refrigerator Kelvinox MX100 (Oxford Instruments)

Ultra low temperature ~ 20 mK can be achieved contentiously by 3He-4He mixture. The superconducting magnet is equipped and you can apply the magnetic field of 10 T. You can measure various properties such as specific heat, electric resistivity, Hall effect, SQUID AC/DC magnetization, dielectric constant and thermal expansion. The picture at the lower panel is the one for the probe.

Lowest temprature: 11 mK
Cooling powerF100 W @ 100 mK
Max. field: 8 T (with lambda plateF 10 T)

Cryogen free magnet with VTI:TeslatronPT (Oxford Instruments)

This is a cryogen-free magnet by using pulse-tube refrigerator. You can perform various measurements in the wide temperature region with the variable temperature insert (VTI) or 3He refrigerator (Heliox-VT).
TemperatureF1.5 - 300 K (VTI), 0.28 - 300 K (HelioxVT)
Magnetic fieldF8 T

Variable Temperature Insert (VTI)(Cryo Industries)

You can perform various measurements such as resistivity, ac-susceptibility and dielectric constant form room temperature to 1.5 K.

Dilatometer

The dilation of the samples can be measured by attaching to the PPMS (2 K - 300 K) or dilution refrigerator (5 K - 80 mK) under magnetic field.
By using capacitive method, we can measure thermal expansion or magnetostriction with high sensitivity (up to 0.02 Å).

16/18 T Superconducting Magnet 16/18/LLD-TN (Oxford Instruments)

Very high magnetic field up to 16 T (18 T with lambda plate) can be applied.
This magnet allows us to study the quantum oscillation from magnetic torque (dHvA oscillation) or magnetoresistance (SdH oscillation) measurements.
Various refrigerators can be installed into this magnet. Sample space ~3.0cm.
Dilution Refrigerator(Kelvinox 25): 35 mK - 1.5 K
He3 Refrigerator (HelioxVT): 230 mK - 300 K
VTI: 1.5 K - 300 K

Ultra-high-vacuum sputtering system ES-250L (Eiko)

Thin film samples can be prepared by magnetron sputtering in both DC and RF mode. In our sputtering system, we can put seven targets for sputtering, five in a revolver type sputtering gun, two in the cosputtering type sputtering gun.
High vacuum: 2.0 ~ 10 ^ (- 7) Pa
Highest substrate heating temperature: 900
Exhaust speed: 900 L / sec (turbo molecular pump)

Electrical and heat transport prober with vacuum and variable temperatures GRAIL10-305-5-LV-HT-MG-R (Nagase Techno.)

This prober is equipped with a mechanical refrigerator and it is possible to measure electrical and heat transport properties from a low temperature of 20 K to a high temperature of 473 K (200 C) without using a liquid refrigerant.
Temperature range: 20-473 K
Current noise: } 50 fA or less (when Triaxial Connect is used)
Max. magnetic field: 0.8 T

High frequency prober with vacuum and variable temperatures GRAIL10-305-3-2RF-LV-MG-R (Nagase Techno.)

This prober is a device that can perform high-frequency measurement with low noise in a wide temperature range from low temperature to room temperature.

Temperature range: 9-300 K
Current noise: } 50 fA or less (when Triaxial Connect is used)
Max. magnetic field: 0.8 T

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In our group, we study new magnetic and electric effects in new materials with strong correlation and quantum effects, which are potently important for devices or energy harvesting. We synthesize various alloys and compounds and thin films by various techniques by ourselves. At the same time, we perform various measurements from room temperature to ultra-low temperature, where quantum effects are important.

Postdoctoral Fellowship

For application of Postdoctoral Fellowship, please contact Nakatsuji.