Magnetic behavior of the $5d^1$ Re-based double perovskite Sr$_2$ZnReO$_6$
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| Auteurs principaux: | , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866910059763597312 |
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| author | Isah, Muhammad Maikudi Dalal, Biswajit Kang, Xun Mosca, Dario Fiore Onuorah, Ifeanyi John Scagnoli, Valerio Bonfà, Pietro De Renzi, Roberto Belik, Alexei A. Franchini, Cesare Yamaura, Kazunari Sanna, Samuele |
| author_facet | Isah, Muhammad Maikudi Dalal, Biswajit Kang, Xun Mosca, Dario Fiore Onuorah, Ifeanyi John Scagnoli, Valerio Bonfà, Pietro De Renzi, Roberto Belik, Alexei A. Franchini, Cesare Yamaura, Kazunari Sanna, Samuele |
| contents | The subtle interplay between spin-orbit coupling, exchange interactions, and cation ordering can lead to exotic magnetic states in transition-metal ions. We report a comprehensive study of the Re-based (5$d^1$) ordered double perovskite oxide Sr$_2$ZnReO$_6$ combining synchrotron x-ray diffraction (XRD), magnetic susceptibility, muon spin relaxation ($μ$SR) measurements, and density functional theory (DFT) calculations. XRD reveals that Sr$_2$ZnReO$_6$ crystallizes in the monoclinic structure (space group $P2_1/n$) at low temperature. Magnetic susceptibility data indicate a transition below $\sim$13 K, with $M$--$H$ loops showing ferromagnetic-like hysteresis and an unusually high coercive field of 23 kOe at 2 K. Zero-field $μ$SR measurements detect static and spatially disordered internal fields below $T_M \simeq $ 12 K, consistent with a canted antiferromagnetic ground state determined by detailed DFT and force-theorem in Hubbard-I calculations. The reduced high-temperature effective moment ($\sim0.76~μ_B$) and very small static moment ($\lesssim 0.2~μ_B$) derived from $μ$SR analysis and local-field simulations indicate a decisive role of spin-orbit coupling. Through a combined experimental and computational approach we unambiguously determine the canted antiferromagnetic order in Sr$_2$ZnReO$_6$, showing that a very small ordered moment coexists with an exceptionally large coercivity. These results underscore the crucial role of spin-orbit coupling and orbital ordering, providing new insights into magnetism in 5$d^1$ double perovskites. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_04071 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magnetic behavior of the $5d^1$ Re-based double perovskite Sr$_2$ZnReO$_6$ Isah, Muhammad Maikudi Dalal, Biswajit Kang, Xun Mosca, Dario Fiore Onuorah, Ifeanyi John Scagnoli, Valerio Bonfà, Pietro De Renzi, Roberto Belik, Alexei A. Franchini, Cesare Yamaura, Kazunari Sanna, Samuele Strongly Correlated Electrons The subtle interplay between spin-orbit coupling, exchange interactions, and cation ordering can lead to exotic magnetic states in transition-metal ions. We report a comprehensive study of the Re-based (5$d^1$) ordered double perovskite oxide Sr$_2$ZnReO$_6$ combining synchrotron x-ray diffraction (XRD), magnetic susceptibility, muon spin relaxation ($μ$SR) measurements, and density functional theory (DFT) calculations. XRD reveals that Sr$_2$ZnReO$_6$ crystallizes in the monoclinic structure (space group $P2_1/n$) at low temperature. Magnetic susceptibility data indicate a transition below $\sim$13 K, with $M$--$H$ loops showing ferromagnetic-like hysteresis and an unusually high coercive field of 23 kOe at 2 K. Zero-field $μ$SR measurements detect static and spatially disordered internal fields below $T_M \simeq $ 12 K, consistent with a canted antiferromagnetic ground state determined by detailed DFT and force-theorem in Hubbard-I calculations. The reduced high-temperature effective moment ($\sim0.76~μ_B$) and very small static moment ($\lesssim 0.2~μ_B$) derived from $μ$SR analysis and local-field simulations indicate a decisive role of spin-orbit coupling. Through a combined experimental and computational approach we unambiguously determine the canted antiferromagnetic order in Sr$_2$ZnReO$_6$, showing that a very small ordered moment coexists with an exceptionally large coercivity. These results underscore the crucial role of spin-orbit coupling and orbital ordering, providing new insights into magnetism in 5$d^1$ double perovskites. |
| title | Magnetic behavior of the $5d^1$ Re-based double perovskite Sr$_2$ZnReO$_6$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2509.04071 |