000843950 001__ 843950 000843950 005__ 20240610121148.0 000843950 0247_ $$2doi$$a10.1103/PhysRevLett.119.257204 000843950 0247_ $$2ISSN$$a0031-9007 000843950 0247_ $$2ISSN$$a1079-7114 000843950 0247_ $$2ISSN$$a1092-0145 000843950 0247_ $$2Handle$$a2128/17497 000843950 0247_ $$2pmid$$apmid:29303328 000843950 0247_ $$2WOS$$aWOS:000418619100018 000843950 0247_ $$2altmetric$$aaltmetric:30266813 000843950 037__ $$aFZJ-2018-01473 000843950 082__ $$a550 000843950 1001_ $$0P:(DE-HGF)0$$aStock, C.$$b0$$eCorresponding author 000843950 245__ $$aOrphan Spins in the S = 5 2 Antiferromagnet CaFe 2 O 4 000843950 260__ $$aCollege Park, Md.$$bAPS$$c2017 000843950 3367_ $$2DRIVER$$aarticle 000843950 3367_ $$2DataCite$$aOutput Types/Journal article 000843950 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1519658939_3041 000843950 3367_ $$2BibTeX$$aARTICLE 000843950 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000843950 3367_ $$00$$2EndNote$$aJournal Article 000843950 520__ $$aCaFe2O4 is an anisotropic S=52 antiferromagnet with two competing A (↑↑↓↓) and B (↑↓↑↓) magnetic order parameters separated by static antiphase boundaries at low temperatures. Neutron diffraction and bulk susceptibility measurements, show that the spins near these boundaries are weakly correlated and a carry an uncompensated ferromagnetic moment that can be tuned with a magnetic field. Spectroscopic measurements find these spins are bound with excitation energies less than the bulk magnetic spin waves and resemble the spectra from isolated spin clusters. 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