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PPMS Ultrasonic elastic constant measurement option (English page)

Quantum Design Japan introduces PPMS Ultrasonic Option developed as co-development work with Iwate University Japan. The Ultrasonic Option can measure elastic constant through special sample probe using ultrasonic sound.

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Features

High accurate measurement ( 1ppm acoustic velocity change )

Two measurement modes for elastic constant

Phase Comparison Method
* High accuracy measurement for slow acoustic velocity change according to temperature and magnetic field

Orthogonal Phase Detection Experimental Method (ORPHEUS)
* High speed measurement (0.1 millisecond)
* For large acoustic velocity change according to temperature and magnetic field
* For transient acoustic velocity change

Easy sample setting using cartridge-type sample holder

All operation via PC with TCP/IP interface

* Setting frequency, repetition rate, pulse width, amplitude , gate position
* Remote control and monitoring possible by PC or Tablet through internet

Specification

Main Controller

Measured physical quantity

  • Relative acoustic velocity change
  • Ultrasonic attenuation coefficient

Ultrasonic oscillator

  • Pulse method
  • Frequency:10MHz to 160MHz
  • Pulse width: > 0.05 microsecond
  • Repeat cycle : 500Hz to 50 kHz

Absolute velocity measurement method

  • Pulse echo method
  • Phase rotation method

Velocity change measurement method

  • Phase Comparison Method
  • Orthogonal Phase Detection Experimental Method (ORPHEUS)

PC interface

  • TCP/IP

Cartridge type sample rod with transducer

Measurement method

  • Ultrasonic transmission method /reflection method

Electroacoustic transducer

  • LiNbO3

Basic Frequency

  • Longitudinal wave : 30MHz
  • Transverse wave : 19MHz
  • According to sample status, odd harmonic of the fundamental ultrasonic wave possible

Sample size

  • 1mm to 10mm

Application software  

Requirement
  • National Instruments’ LabVIEW run-time version

Setting items

  • frequency,  phase, repetition rate, pulse width, amplitude , amplification, gate position

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