Magnetothermodynamics of Antiferromagnetic, Ferroelectric β‐Gd2(MoO4)3. III. Heat Capacity, Entropy, Magnetic Moment of the Electrically Polarized Form from 0.4 to 4.2°K with Fields to 90 kG along the b Crystal Axis

作者: G. E. Brodale , R. A. Fisher , E. W. Hornung , W. F. Giauque

DOI: 10.1063/1.1677163

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摘要: The magnetic moment of a 2.49‐cm diam spherical single crystal electrically polarized β‐Gd2(MoO4)3 has been measured at stabilized fields 500, 1000, 1500, 2000, 2200, 2300, 2500, 3500, 5000, 10 000, 15 25 40 65 and 90 000 G along the c axis over range 0.3–4.2°K. heat capacity 0, similar temperature range. dependent reached saturation higher low temperatures. As expected, any effect reversing field with respect to electrical polarization was too small be detected, i.e., less than 0.01% moment. general character its derivatives vs 0.5°K below indicates development an antiferromagnetic system. fact that vaporization momentum (h/2π) from essentially saturated state exceeds 2MsatH/7, bo...

参考文章(20)
Hans J. Borchardt, Paul E. Bierstedt, Gd2(MoO4)3: A FERROELECTRIC LASER HOST Applied Physics Letters. ,vol. 8, pp. 50- 52 ,(1966) , 10.1063/1.1754477
W. F. Giauque, Sample Chamber for Magnetothermodynamic Measurements Review of Scientific Instruments. ,vol. 37, pp. 488- 491 ,(1966) , 10.1063/1.1720222
R. A. Fisher, G. E. Brodale, E. W. Hornung, W. F. Giauque, Thermal Conductivity and Heat Capacity of 7740 Pyrex below 4°K and in Magnetic Fields to 90 kG Review of Scientific Instruments. ,vol. 39, pp. 108- 114 ,(1968) , 10.1063/1.1683081
W. L. Johnson, A. C. Anderson, The Stability of Carbon Resistance Thermometers Review of Scientific Instruments. ,vol. 42, pp. 1296- 1300 ,(1971) , 10.1063/1.1685370
B. H. Smith, J. R. Atwood, D. N. Lyon, Current Regulator for a 10 000‐A dc 7.5‐MW Magnet Power Supply Review of Scientific Instruments. ,vol. 35, pp. 340- 352 ,(1964) , 10.1063/1.1718817
W. F. Giauque, Temperatures below 1deg Industrial & Engineering Chemistry. ,vol. 28, pp. 743- 750 ,(1936) , 10.1021/IE50318A032
T. H. Geballe, D. N. Lyon, J. M. Whelan, W. F. Giauque, Carbon Thermometer‐Heaters for Use at Low Temperatures. Effects of Particle Size and Adsorption of Hydrogen or Helium Review of Scientific Instruments. ,vol. 23, pp. 489- 492 ,(1952) , 10.1063/1.1746425
W. F. Giauque, D. N. Lyon, Design of a 100‐Kilogauss 4‐Inch Core Solenoid for Continuous Operation Review of Scientific Instruments. ,vol. 31, pp. 374- 390 ,(1960) , 10.1063/1.1716986
Ralph M. Buffington, Wendell M. Latimer, The Measurement of Coefficients of Expansion at Low Temperatures. Some Thermodynamic Applications of Expansion Data. Journal of the American Chemical Society. ,vol. 48, pp. 2305- 2319 ,(1926) , 10.1021/JA01420A009