Physics of the Solid State
Volumes and Issues
Magnetic properties of Rb2KFeF6
Balaev A.D.1, Voronov V.N.1, Sosnin V.M.1, Balaev D.A.1
1Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
Email: dabalaev@iph.krasn.ru

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The static magnetic properties of the Rb2KFeF6 single crystal in the temperature range T=1.8-300 K in magnetic fields H up to 90 kOe are investigated. At T>1.8 K the crystal is not magnetically ordered, however, the behavior of the inverse susceptibility chi-1(T) indicates a negative paramagnetic Curie temperature of Theta~-0.8 K. This is consistent with the analysis of the magnetization curve Heff by replacing the external field with an effective Heff field with a negative molecular field constant Keywords: Rb2KFeF6 single crystal, magnetic properties, negative magnetic interactions.
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