Slow spin dynamics and quantum tunneling of magnetization in the dipolar antiferromagnet DyScO3

N. D. Andriushin; S. E. Nikitin; G. Ehlers; A. Podlesnyak

doi:10.1103/PhysRevB.106.104427

Slow spin dynamics and quantum tunneling of magnetization in the dipolar antiferromagnet DyScO3

N. D. Andriushin, S. E. Nikitin, G. Ehlers, A. Podlesnyak

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2 Scopus citations

Abstract

We present a comprehensive study of static and dynamic magnetic properties in the Ising-like dipolar antiferromagnet (AFM) DyScO3 by means of DC and AC magnetization measurements supported by classical Monte Carlo calculations. Our AC-susceptibility data show that the magnetic dynamics exhibit a clear crossover from an Arrhenius-like regime to quantum tunneling of magnetization (QTM) at T∗=10K. Below TN=3.2K, DyScO3 orders in an antiferromagnetic GxAy-type magnetic structure and the magnetization dynamics slow down to the minute timescale. The low-temperature magnetization curves exhibit complex hysteretic behavior, which depends strongly on the magnetic field sweep rate. We demonstrate that the low-field anomalies on the magnetization curve are related to the metamagnetic transition, while the hysteresis at higher fields is induced by a strong magnetocaloric effect. Our theoretical calculations, which take into account dipolar interaction between Dy3+ moments, reproduce essential features of the magnetic behavior of DyScO3. We demonstrate that DyScO3 represents a rare example of an inorganic compound, which exhibits QTM at a single-ion level and magnetic order due to classical dipolar interaction.

Original language	English
Article number	104427
Journal	Physical Review B
Volume	106
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.106.104427
State	Published - Sep 1 2022

Bibliographical note

Publisher Copyright:
© 2022 American Physical Society.

Funding

We thank O. Stockert and A. S. Sukhanov for stimulating discussions and A. Turrini for help with neutron diffraction measurements. S.E.N. acknowledges financial support from the European Union Horizon 2020 research and innovation program under Marie Skłodowska-Curie Grant No. 884104. The work of N.D.A. was supported by the German Research Foundation (DFG) through Grant No. PE 3318/3-1. This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. This work is based on experiments performed at the Swiss spallation neutron source SINQ, Paul Scherrer Institute, Villigen, Switzerland.

Funders	Funder number
Horizon 2020 Framework Programme
Deutsche Forschungsgemeinschaft	PE 3318/3-1
Horizon 2020	884104

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10.1103/PhysRevB.106.104427

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abstract = "We present a comprehensive study of static and dynamic magnetic properties in the Ising-like dipolar antiferromagnet (AFM) DyScO3 by means of DC and AC magnetization measurements supported by classical Monte Carlo calculations. Our AC-susceptibility data show that the magnetic dynamics exhibit a clear crossover from an Arrhenius-like regime to quantum tunneling of magnetization (QTM) at T∗=10K. Below TN=3.2K, DyScO3 orders in an antiferromagnetic GxAy-type magnetic structure and the magnetization dynamics slow down to the minute timescale. The low-temperature magnetization curves exhibit complex hysteretic behavior, which depends strongly on the magnetic field sweep rate. We demonstrate that the low-field anomalies on the magnetization curve are related to the metamagnetic transition, while the hysteresis at higher fields is induced by a strong magnetocaloric effect. Our theoretical calculations, which take into account dipolar interaction between Dy3+ moments, reproduce essential features of the magnetic behavior of DyScO3. We demonstrate that DyScO3 represents a rare example of an inorganic compound, which exhibits QTM at a single-ion level and magnetic order due to classical dipolar interaction.",

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AU - Ehlers, G.

AU - Podlesnyak, A.

PY - 2022/9/1

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AB - We present a comprehensive study of static and dynamic magnetic properties in the Ising-like dipolar antiferromagnet (AFM) DyScO3 by means of DC and AC magnetization measurements supported by classical Monte Carlo calculations. Our AC-susceptibility data show that the magnetic dynamics exhibit a clear crossover from an Arrhenius-like regime to quantum tunneling of magnetization (QTM) at T∗=10K. Below TN=3.2K, DyScO3 orders in an antiferromagnetic GxAy-type magnetic structure and the magnetization dynamics slow down to the minute timescale. The low-temperature magnetization curves exhibit complex hysteretic behavior, which depends strongly on the magnetic field sweep rate. We demonstrate that the low-field anomalies on the magnetization curve are related to the metamagnetic transition, while the hysteresis at higher fields is induced by a strong magnetocaloric effect. Our theoretical calculations, which take into account dipolar interaction between Dy3+ moments, reproduce essential features of the magnetic behavior of DyScO3. We demonstrate that DyScO3 represents a rare example of an inorganic compound, which exhibits QTM at a single-ion level and magnetic order due to classical dipolar interaction.

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Slow spin dynamics and quantum tunneling of magnetization in the dipolar antiferromagnet DyScO3

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