Cooling in rare-earth paramagnets at ultrahigh pulsed magnetic fields due to energy level crossing

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• 作者：Kazei ; Z.A. ; Kolmakova ; N.P. ; Platonov ; V.V. ; Sidorenko ; A.A. ; Tatsenko ; O.M.
• 关键词：Energy level crossings ; Magnetocaloric effect ; Rare-earth zircons
• 刊名：Physica B
• 出版年：2000
• 出版时间：July, 2000
• 年：2000
• 卷：284-288
• 期：Part 2
• 页码：1483-1484
• 全文大小：75.5 K

文摘

Maxima of differential magnetic susceptibility are observed at 4.2 K in a pulsed field in the tetragonal paramagnets YbPO₄ and PrVO₄ at 280 and 45 T, respectively, caused by crossing of the energy levels of rare-earth ions. Different characters of the level interactions result in different types of magnetocaloric effect in the adiabatic regime. A theory of these phenomena is developed.