Specific Heat of Dy.40 Cu.37 Y.23 Amorphous Alloy at Low Temperatures

The low temperature specific heat of the magnetic Dy0.40Cu0.37Y0.23 amorphous alloy have been investigated in the temperature range 2 to 50 K. The magnetic contributions to the specific heat, magnetic entropy changes, ordering temperatures and the effective magnetic spin have been estimated for this magnetic amorphous alloy. The magnetic specific heat show broad anomaly at a certain temperature, Tm of about 28 K. The value of Tm is higher than Tf (=23.5 K) determined from low field ac susceptibility measurements. The magnetic entropy changes between 0 K and Tm are estimated to be 84 % of the maximum theoretical value. The behaviors of this amorphous alloy agree quit well with those of condensed rare earth amorphous systems.

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The large low-field magnetic entropy changes in Ni43Mn46Sn11−xSbx alloys

Solid State Communications ◽

10.1016/j.ssc.2007.04.007 ◽

2007 ◽

Vol 142 (10) ◽

pp. 591-594 ◽

Cited By ~ 9

Author(s):

H.C. Xuan ◽

D.H. Wang ◽

C.L. Zhang ◽

Z.D. Han ◽

H.S. Liu ◽

...

Keyword(s):

Magnetic Entropy ◽

Entropy Changes ◽

Low Field

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The study of low-field positive and negative magnetic entropy changes in Ni43Mn46−xCuxSn11 alloys

Journal of Applied Physics ◽

10.1063/1.2752140 ◽

2007 ◽

Vol 102 (1) ◽

pp. 013909 ◽

Cited By ~ 59

Author(s):

D. H. Wang ◽

C. L. Zhang ◽

H. C. Xuan ◽

Z. D. Han ◽

J. R. Zhang ◽

...

Keyword(s):

Magnetic Entropy ◽

Entropy Changes ◽

Low Field

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ChemInform Abstract: Magnetic Specific Heat and Susceptibility Measurements on NdBa2Cu3- xGaxO7-y at Low Temperatures.

ChemInform ◽

10.1002/chin.199614013 ◽

2010 ◽

Vol 27 (14) ◽

pp. no-no

Author(s):

A. M. NIRAIMATHI ◽

G. RANGARAJAN ◽

R. K. KREMER ◽

E. GMELIN

Keyword(s):

Specific Heat ◽

Low Temperatures ◽

Magnetic Specific Heat

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Low-field magnetic entropy changes in (Gd1–xYx)3Al2 alloys

Journal of Rare Earths ◽

10.1016/s1002-0721(10)60437-1 ◽

2011 ◽

Vol 29 (3) ◽

pp. 235-238

Author(s):

Zhida HAN ◽

Bin QIAN ◽

Ping ZHANG ◽

Xuefan JIANG ◽

Dunhui WANG ◽

...

Keyword(s):

Magnetic Entropy ◽

Entropy Changes ◽

Low Field

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Magnetic Specific Heat of Cd1−xMnxTe at Low Temperatures and High Magnetic Fields

MRS Proceedings ◽

10.1557/proc-89-33 ◽

1986 ◽

Vol 89 ◽

Author(s):

W. Y. Ching ◽

D. L. Huber

Keyword(s):

Specific Heat ◽

Low Temperatures ◽

Inelastic Neutron Scattering ◽

Exchange Interactions ◽

Dynamic Structure ◽

Inelastic Neutron ◽

Magnetic Specific Heat ◽

Theoretical Predictions ◽

Use Values ◽

Applied Fields

AbstractTheoretical predictions for the magnetic specific heat of Cd1−xMnxTe:x=0.20, 0.35, 0.50, and 0.65 are reported for B=0, 10T, and 100T. The analysis applies to the low-temperature regime, T≤10K, where the fundamental excitations are harmonic magnons. The calculations use values for the exchange interactions which were inferred from fits to the dynamic structure factor describing inelastic neutron scattering at low temperatures. For x=0.35, 0.50, and 0.65 the specific heat is only weakly affected by applied fields up to 10T. At the lowest concentration the application of a field of 10T leads to a significant reduction in the specific heat. Results are also presented for the distribution of magnon modes at various concentrations and fields.

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