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Stability of the ferromagnetic ground state of La₂ MnNiO₆ against large compressive stress Public Deposited

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  • The effect of quasi-hydrostatic pressure upon the ferromagnetic ground state of magnetodielectric, double- perovskite La₂ MnNiO₆ is investigated using x-ray absorption spectroscopy and diffraction measurements in a diamond anvil cell. The Mn-O-Ni superexchange interaction that gives rise to ferromagnetism in this cation- ordered structure is stable to at least 38 GPa (380 000 atm). Such unusual stability of a ferromagnetic state to applied pressure can be rationalized in terms of the electronic and crystal structure and should help preserve the outstanding electronic and magnetic properties of this material when grown epitaxially under moderate compressive and tensile strain conditions.
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  • Haskel, D., Fabbris, G., Souza-Neto, N. M., van Veenendaal, M., Shen, G., Smith, A. E., & Subramanian, M. A. (2011, September 12). Stability of the ferromagnetic ground state of La2 MnNiO₆ against large compressive stress. Physical Review B, 84(10). doi:10.1103/PhysRevB.84.100403
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  • Work at Argonne and NIU is supported by the US Depart- ment of Energy, Office of Science, under Contracts No. DE- AC02-06CH11357 and DE-FG02-03ER46097, respectively. Work at Oregon State University is supported by NSF Grant No. DMR0804167. HPCAT is supported by CIW, CDAC, UNLV, LLNL through funding from DOE-NNSA, DOE-BES, and NSF.
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