Complex magnetism of lanthanide intermetallics unravelled
| Autor: | Petit, L., Paudyal, D., Mudryk, Y., Gschneidner Jr., K. A., Pecharsky, V. K., Lueders, M., Szotek, Z., Banerjee, R., Staunton, J. B. |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 115, 207201 (2015) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.115.207201 |
| Popis: | We explain a profound complexity of magnetic interactions of some technologically relevant gadolinium intermetallics using an ab-initio electronic structure theory which includes disordered local moments and strong $f$-electron correlations. The theory correctly finds GdZn and GdCd to be simple ferromagnets and predicts a remarkably large increase of Curie temperature with pressure of +1.5 K kbar$^{-1}$ for GdCd confirmed by our experimental measurements of +1.6 K kbar$^{-1}$. Moreover we find the origin of a ferromagnetic-antiferromagnetic competition in GdMg manifested by non-collinear, canted magnetic order at low temperatures. Replacing 35\% of the Mg atoms with Zn removes this transition in excellent agreement with longstanding experimental data. Comment: 11 pages, 4 figures |
| Databáze: | arXiv |
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