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Holenstein, S.; Hummel, F.; Guguchia, Z.; Kamusella, S.; Barbero, N.; Ogino, H.; Shermadini, Z.; Khasanov, R.; Amato, A.; Shiroka, T.; Klauss, H-H; Morenzoni, E.; Johrendt, D. and Luetkens, H. (2021): Pressure dependence of the superconducting and magnetic transition temperatures in Sr2VO3FeAs. In: Physical Review B, Vol. 104, No. 10, 104507

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We report muon spin rotation (mu SR) and magnetization measurements on superconducting Sr2VO3FeAs under pressure. At ambient pressure, Sr2VO3FeAs undergoes an antiferromagnetic transition of the V moments at T-N and becomes superconducting at T-c < T-N. As a function of pressure, T-N initially decreases while T-c increases. Surprisingly, once T-N approximate to T-c at 0.6 GPa, T-N reverses its trend and increases together with T-c, which might indicate a cooperative coupling of the superconducting and the magnetic order.

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