Magnetochemistry of the tetrahaloferrate(III) ions. 4. Heat capacity and magnetic ordering in bis[4-chloropyridinium tetrachloroferrate(III)]-4-chloropyridinium chloride

1992 ◽  
Vol 31 (4) ◽  
pp. 710-712 ◽  
Author(s):  
Roey Shaviv ◽  
Richard L. Carlin
Keyword(s):  
Heat Capacity ◽  
Magnetic Ordering

Magnetic ordering and enhanced electronic heat capacity in insulatingL2RuO5(L=Pr,Nd, Sm, Gd, and Tb)

2001 ◽  
Vol 63 (14) ◽  
Author(s):  
G. Cao ◽  
S. McCall ◽  
Z. X. Zhou ◽  
C. S. Alexander ◽  
J. E. Crow ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Magnetic Ordering ◽  
Electronic Heat Capacity ◽  
Electronic Heat

Molecular-based compounds exhibiting a spontaneous magnetization

1990 ◽  
Vol 330 (1610) ◽  
pp. 195-204 ◽  
Keyword(s):  
Heat Capacity ◽  
Magnetic Susceptibility ◽  
Broad Spectrum ◽  
Spontaneous Magnetization ◽  
Magnetic Ordering ◽  
Molecular Chemistry ◽  
Regular Chain ◽  
Capacity Data ◽  
Alternating Chain ◽  
Chain Compound

One of the main challenges in the field of the molecular materials is the design of molecular-based ferromagnets. My basic strategy along this line consists of assembling ferrimagnetic chains within the crystal lattice in a ferromagnetic fashion. This can be achieved owing to the (almost) limitless flexibility of the molecular chemistry. The chains may be either regular or alternating. Examples of both situations are presented. MnCu(pbaOH) (H 2 O) 3 (pbaOH = 2-hydroxy-1,3-propylenebis(oxamato)) is a regular chain compound ordering ferromagnetically at T e 4.6 K, and MnCu(obbz) . 1H 2 O (obbz = oxamido-N,N'-bis(2-benzoato)) is an alternating chain compound exhibiting a spontaneous magnetization below T e = 14 K. To get information on the mechanism of the magnetic ordering, a broad spectrum of physical techniques is utilized, including magnetic susceptibility and magnetization measurements, EPR spectroscopy and heat capacity data. The perspectives in this new field are outlined.

scholarly journals Thermodynamic Studies and Magnetic Ordering of Ni-Cr Alloys Close to the Critical Composition

1982 ◽  
Vol 35 (3) ◽  
pp. 307 ◽  
Author(s):  
MA Simpson ◽  
TF Smith
Keyword(s):  
Heat Capacity ◽  
Thermal Expansion ◽  
Specific Heat ◽  
Specific Heat Capacity ◽  
Significant Contribution ◽  
Magnetic Ordering ◽  
Small Contribution ◽  
Thermal Expansion Data ◽  
Ferromagnetic Alloys ◽  
Magnetic Origin

We report measurements of the specific heat capacity and the thermal expansion for Ni-Cr alloys in the vicinity of the magnetic ordering temperature TM and at lower temperatures. No evidence of a contribution due to the magnetic ordering is found in the specific heat capacity and only the indication of a small contribution in the thermal expansion near to T M for an Ni 11 at. % Cr alloy. A significant contribution of magnetic origin is seen for both quantities at lower temperatures. Values for the magnetic Grlineisen parameter yi, are derived from the specific heat capacity and thermal expansion data and compared with values of dIn TM/d In V obtained from direct easurements of dTM/dP. Both yi, and - d In TM/d In V are large and negative for weakly ferromagnetic alloys but differ numerically, whereas for paramagnetic alloys yi, is large and positive.

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