On the origin of the giant isotopic effect of hydrogen on the magnetic properties of YFe.sub.2./sub.A.sub.4.2./sub. (A = H, D): a high pressure study

0396185 - FZÚ 2014 RIV US eng J - Článek v odborném periodiku
Isnard, O. - Paul-Boncour, V. - Arnold, Zdeněk
On the origin of the giant isotopic effect of hydrogen on the magnetic properties of YFe₂A_4.2 (A = H, D): a high pressure study.
Applied Physics Letters. Roč. 102, č. 12 (2013), "122408-1"-"122408-4". ISSN 0003-6951. E-ISSN 1077-3118
Grant CEP: GA ČR GAP204/12/0692
Institucionální podpora: RVO:68378271
Klíčová slova: antiferromagnetic materials * compressibility * ferromagnetic materials * ferromagnetic-antiferromagnetic transitions * high-pressure effects * iron compoounds
Kód oboru RIV: BE - Teoretická fyzika
Impakt faktor: 3.515, rok: 2013

In order to identify the origin of the giant isotope effect observed on the magnetic properties of YFe2A4.2 compounds (A = H, D) and probe the role of the cell volume difference, we have compared the effect of hydrostatic pressure up to 1.0 GPa on the ferro-antiferromagnetic transition temperatures TF-AF and spontaneous magnetization of YFe2D4.2 and YFe2H4.2. Using compressibility value of 0.013 GPa-1 and the remarkably different negative pressure slopes of TF-AF, the existence of critical volume where the ferromagnetism is suppressed at 0 K, VC = 501.7 ± 0.3Å3, was demonstrated. This consequently established the crucial role of volume on the huge isotope effect observed on the magnetic properties.
Trvalý link: http://hdl.handle.net/11104/0223999