scholarly journals High pressure investigation of superconducting signatures in CeCu2Si2: ac-magnetic susceptibility, ac-heat capacity, resistivity and thermopower

2015 ◽  
Vol 209-210 ◽  
pp. 55-58 ◽  
Author(s):  
G. Giriat ◽  
Z. Ren ◽  
P. Pedrazzini ◽  
D. Jaccard
Keyword(s):  
Heat Capacity ◽  
High Pressure ◽  
Magnetic Susceptibility ◽  
Ac Magnetic Susceptibility

scholarly journals Incompatibility of Published ac Magnetic Susceptibility of a Room Temperature Superconductor with Measured Raw Data

2021 ◽  
Author(s):  
J. E. Hirsch
Keyword(s):  
High Pressure ◽  
Magnetic Susceptibility ◽  
Room Temperature ◽  
Superconducting Transition ◽  
Ac Magnetic Susceptibility ◽  
Raw Data ◽  
Magnetic Susceptibility Data ◽  
Susceptibility Data ◽  
Room Temperature Superconductivity

Room temperature superconductivity has recently been reported for a carbonaceous sulfur hydride (CSH) under high pressure by Snider et al [1]. The paper reports sharp drops in magnetic susceptibility as a function of temperature for five different pressures, that are interpreted as signaling a superconducting transition. Here I question the validity and faithfulness of the magnetic susceptibility data presented in the paper by comparison with the measured raw data reported by two of the authors of ref. [2]. This invalidates the assertion of the paper [1] that the susceptibility measurements support the case for superconductivity in this compound.

scholarly journals Heat Capacity and Ac Magnetic Susceptibility Measurements of Magnetic Superconductor HoNi2B2C under Pressure

2007 ◽  
Vol 76 (Suppl.A) ◽  
pp. 148-149 ◽  
Author(s):  
M. Mito ◽  
T. Tanimoto ◽  
T. Kawae ◽  
K. Takeda ◽  
J. H. Choi ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Magnetic Susceptibility ◽  
Ac Magnetic Susceptibility ◽  
Magnetic Superconductor

scholarly journals Incompatibility of Published ac Magnetic Susceptibility of a Room Temperature Superconductor with Measured Raw Data

2021 ◽  
Author(s):  
Jorge Hirsch
Keyword(s):  
High Pressure ◽  
Magnetic Susceptibility ◽  
Room Temperature ◽  
Superconducting Transition ◽  
Ac Magnetic Susceptibility ◽  
Raw Data ◽  
Magnetic Susceptibility Data ◽  
Susceptibility Data ◽  
Room Temperature Superconductivity

Room temperature superconductivity has recently been reported for a carbonaceous sulfur hydride (CSH) under high pressure by Snider et al [1]. The paper reports sharp drops in magnetic susceptibility as a function of temperature for five different pressures, that are interpreted as signaling a superconducting transition. Here I question the validity and faithfulness of the magnetic susceptibility data presented in the paper by comparison with the measured raw data reported by two of the authors of ref. [2]. This casts doubt on the assertion of the paper [1] that the susceptibility measurements support the case for superconductivity in this compound.

scholarly journals Single Crystal Growth and Physical Properties of Pyroxene CoGeO3

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 378
Author(s):  
Li Zhao ◽  
Zhiwei Hu ◽  
Hanjie Guo ◽  
Christoph Geibel ◽  
Hong-Ji Lin ◽  
...  
Keyword(s):  
High Pressure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Crystal Growth ◽  
Physical Properties ◽  
Single Crystal ◽  
Single Crystals ◽  
Magnetic Moments ◽  
Single Crystal Growth ◽  
The Impact

We report on the synthesis and physical properties of cm-sized CoGeO3 single crystals grown in a high pressure mirror furnace at pressures of 80 bar. Direction dependent magnetic susceptibility measurements on our single crystals reveal highly anisotropic magnetic properties that we attribute to the impact of strong single ion anisotropy appearing in this system with TN∼33.5 K. Furthermore, we observe effective magnetic moments that are exceeding the spin only values of the Co ions, which reveals the presence of sizable orbital moments in CoGeO3.

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