LOW-TEMPERATURE SPECIFIC HEAT OF YMn2 IN THE PARAMAGNETIC AND ANTIFERROMAGNETIC PHASES

1993 ◽  
Vol 07 (01n03) ◽  
pp. 830-833 ◽  
Author(s):  
R.A. FISHER ◽  
R. BALLOU ◽  
J.P. EMERSON ◽  
E. LELIEVRE-BERNA ◽  
N.E. PHILLIPS
Keyword(s):  
Low Temperature ◽  
Specific Heat ◽  
Applied Pressure ◽  
Paramagnetic State ◽  
Linear Term ◽  
Spin Fluctuations ◽  
Spin Frustration ◽  
Magnetic Instability ◽  
Low Temperature Specific Heat

The low-temperature specific heat of YMn2 has been measured at applied pressures of 0 to 7.7 kbar. A paramagnetic state is stabilized for moderate values of the applied pressure (of the order of 1.6 kbar). A large linear term in the specific heat, which decreases regularly with increasing pressure, is observed in this phase. It is ascribed to giant spin fluctuations associated with a magnetic-non magnetic instability and a strong geometrical spin frustration.

Nodal gap behavior of Bi2Sr2−xLnxCuO6+δ (Ln = La, Eu) investigated by specific heat measurements

2015 ◽  
Vol 29 (25n26) ◽  
pp. 1542014 ◽  
Author(s):  
M. Shimizu ◽  
Y. Moriya ◽  
S. Baar ◽  
N. Momono ◽  
Y. Amakai ◽  
...  
Keyword(s):  
Low Temperature ◽  
Magnetic Fields ◽  
Fermi Surface ◽  
Specific Heat ◽  
Excitation Spectrum ◽  
Cuprate Superconductors ◽  
Electronic Excitation ◽  
Linear Term ◽  
Electronic Specific Heat ◽  
Low Temperature Specific Heat

We performed low-temperature specific heat measurements on slightly underdoped samples of monolayer cuprate superconductors [Formula: see text] (Ln = La, Eu, Ln-Bi2201) under magnetic fields [Formula: see text]. In La-Bi2201, the coefficient [Formula: see text] of [Formula: see text]-linear term in the electronic specific heat [Formula: see text] at [Formula: see text] shows [Formula: see text] dependence, as expected in [Formula: see text] -wave superconductors. In Eu-Bi2201, [Formula: see text] shows almost the same [Formula: see text] dependence as that of La-Bi2201 below [Formula: see text] T, while [Formula: see text] is suppressed above [Formula: see text] T and deviates downward from the [Formula: see text] curve of La-Bi2201. This result suggests the the gap and the electronic excitation spectrum near nodes are modified in Eu-Bi2201 except the region of the Fermi surface in the immediate vicinity of nodes.

Low Temperature Specific Heat in Lightly Mn-Substituted Electron-Doped SrTiO3

2017 ◽  
Vol 86 (8) ◽  
pp. 084601 ◽  
Author(s):  
Tetsuji Okuda ◽  
Hiroto Hata ◽  
Takahiro Eto ◽  
Shogo Sobaru ◽  
Ryosuke Oda ◽  
...  
Keyword(s):  
Low Temperature ◽  
Specific Heat ◽  
Low Temperature Specific Heat
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