@article{f5ac8456adf14b28a8bfc5457fe84696,
title = "Nanoscale Magnetic Ordering Dynamics in a High Curie Temperature Ferromagnet",
abstract = "Thermally driven transitions between ferromagnetic and paramagnetic phases are characterized by critical behavior with divergent susceptibilities, long-range correlations, and spin dynamics that can span kHz to GHz scales as the material approaches the critical temperature Tc, but it has proven technically challenging to probe the relevant length and time scales with most conventional measurement techniques. In this study, we employ scanning nitrogen-vacancy center based magnetometry and relaxometry to reveal the critical behavior of a high-Tc ferromagnetic oxide near its Curie temperature. Cluster analysis of the measured temperature-dependent nanoscale magnetic textures points to a 3D universality class with a correlation length that diverges near Tc. Meanwhile, the temperature-dependent spin dynamics, measured through all optical relaxometry suggest that the phase transition is in the XY universality class. Our results capture both static and dynamic aspects of critical behavior, providing insights into universal properties that govern phase transitions in magnetic materials.",
keywords = "NV center, Quantum sensing, Relaxometry",
author = "Wu, {Yueh Chun} and Hal{\'a}sz, {G{\'a}bor B.} and Damron, {Joshua T.} and Zheng Gai and Huan Zhao and Yuxin Sun and Dahmen, {Karin A.} and Changhee Sohn and Carlson, {Erica W.} and Chengyun Hua and Shan Lin and Jeongkeun Song and Lee, {Ho Nyung} and Lawrie, {Benjamin J.}",
note = "This research was sponsored by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division and in part by the Computational Materials Sciences Program and Center for Predictive Simulation of Functional Materials. Scanning NV microscopy was supported by the Center for Nanophase Materials Sciences (CNMS), which is a US Department of Energy, Office of Science User Facility at Oak Ridge National Laboratory. YS and EC acknowledge support from from the Department of Energy under grant DOE-QIS (DE-FOA-0002449). EC acknowledges support from NSF Grant no. DMR-2006192. KD thanks the University of Illinois at Urbana\u2013Champaign for support. This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).",
year = "2025",
month = jan,
day = "29",
doi = "10.1021/acs.nanolett.4c05401",
language = "English (US)",
volume = "25",
pages = "1473--1479",
journal = "Nano letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "4",
}