Synthesis and physical properties of a new layered ferromagnet Cr1.21 Te2

Shu, Zhixue; Wang, Haozhe; Jo, Na Hyun; Jozwiak, Chris; Bostwick, Aaron; Rotenberg, Eli; Xie, Weiwei; Kong, Tai

doi:10.1103/physrevmaterials.7.044406

Title: Synthesis and physical properties of a new layered ferromagnet Cr_1.21 Te₂

Journal Article · 11 April 2023 · Physical Review Materials

DOI: https://doi.org/10.1103/physrevmaterials.7.044406 · OSTI ID:2234155

Shu, Zhixue ^[1];

^[2]; Jo, Na Hyun ^[3];

^[4]; Bostwick, Aaron ^[4];

^[4]; Xie, Weiwei ^[2];

^[1]

Univ. of Arizona, Tucson, AZ (United States)
Michigan State Univ., East Lansing, MI (United States)
Univ. of Michigan, Ann Arbor, MI (United States)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)

Single crystals of a new layered compound, Cr_1.21 Te₂, were synthesized via a vapor transport method. The crystal structure and physical properties were characterized by single crystal and powder x-ray diffraction, temperature- and field-dependent magnetization, zero-field heat capacity, and angle-resolved photoemission spectroscopy. Cr_1.21 Te₂, containing two Cr sites, crystalizes in a trigonal structure with a space group P-3 (No. 147). The Cr site in the interstitial layer is partially occupied. Physical property characterizations indicate that Cr_1.21 Te₂ is metallic with hole pockets at the Fermi energy and undergoes a ferromagnetic phase transition at ~ 173 K. The magnetic moments align along the c axis in the ferromagnetic state. Based on low-temperature magnetization, the spin stiffness constant, D, and spin excitation gap, Δ , were estimated according to Bloch's law to be D = 94 ± 17 meV Å² and Δ = 0.45 ± 0.33 meV, suggesting its possible application as a low dimensional ferromagnet.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: AC02-05CH11231; SC0023648

OSTI ID:: 2234155

Journal Information:: Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 4 Vol. 7; ISSN 2475-9953

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Synthesis and physical properties of a new layered ferromagnet Cr1.21 Te2

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Title: Synthesis and physical properties of a new layered ferromagnet Cr_1.21 Te₂