Abstract
A miniature opposed-anvil high-pressure cell has been developed for magnetic measurement in a commercial superconducting quantum interference device magnetometer. Non-magnetic anvils made of composite ceramic material were used to generate high-pressure with a Cu-Be gasket. We have examined anvils with different culet sizes (1.8, 1.6, 1.4, 1.2, 1.0, 0.8, and 0.6 mm). The pressure generated at low temperature was determined by the pressure dependence of the superconducting transition of lead (Pb). The maximum pressure P(max) depends on the culet size of the anvil: the values of P(max) are 2.4 and 7.6 GPa for 1.8 and 0.6 mm culet anvils, respectively. We revealed that the composite ceramic anvil has potential to generate high-pressure above 5 GPa. The background magnetization of the Cu-Be gasket is generally two orders of magnitude smaller than the Ni-Cr-Al gasket for the indenter cell. The present cell can be used not only with ferromagnetic and superconducting materials with large magnetization but also with antiferromagnetic compounds with smaller magnetization. The production cost of the present pressure cell is about one tenth of that of a diamond anvil cell. The anvil alignment mechanism is not necessary in the present pressure cell because of the strong fracture toughness (6.5 MPa m(1∕2)) of the composite ceramic anvil. The simplified pressure cell is easy-to-use for researchers who are not familiar with high-pressure technology. Representative results on the magnetization of superconducting MgB(2) and antiferromagnet CePd(5)Al(2) are reported.
Highlights
Pressure is an important parameter in condensed matter physics.1 Applying pressure changes lattice parameters, bonding angles, and overlap of the wave functions of electrons in a material
The background magnetization of the Ni-Cr-Al gasket in the indenter-type cell is quite large and the maximum pressure is about 2.5–3.0 GPa
We studied the pressure effect of the superconducting transition temperature in the present pressure cell with the 0.6 mm culet anvils
Summary
Pressure is an important parameter in condensed matter physics. Applying pressure changes lattice parameters, bonding angles, and overlap of the wave functions of electrons in a material. The indenter-type cell is easier to use and the volume of the sample space is about 1 mm. The background magnetization of the Ni-Cr-Al gasket in the indenter-type cell is quite large and the maximum pressure is about 2.5–3.0 GPa.. We have studied the superconductivity and the magnetism in the rare earth and actinide compounds where many interesting physical phenomena have been discovered mainly in the pressure region from 2 to 5 GPa.. A simple opposedanvil high-pressure cell has been developed for magnetic measurements using the commercial SQUID magnetometer. Non-magnetic anvils made of composite ceramic are used to generate high-pressure above 5 GPa. The background magnetization of the present pressure cell is significantly smaller than that of the indenter cell. Piston cylinder-type cell (Refs. 5–10) Indenter-type cell (Ref. 15) Diamond anvil cell (Refs. 11, 13, and 14) Present ceramic anvil cell
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
