Quantum phase transition and ferromagnetism in C o1+x Sn

Pahari, Rabindra; Balasubramanian, Balamurugan; Pathak, Rohit; Nguyen, Manh Cuong; Valloppilly, Shah R.; Skomski, Ralph; Kashyap, Arti; Wang, Cai-Zhuang; Ho, Kai-Ming; Hadjipanayis, George C.; Sellmyer, David J.

doi:10.1103/physrevb.99.184438

Quantum phase transition and ferromagnetism in $C o_{1 + x} Sn$

Journal Article · Tue May 28 00:00:00 EDT 2019 · Physical Review B

DOI:https://doi.org/10.1103/physrevb.99.184438· OSTI ID:1609559

Pahari, Rabindra ^[1]; Balasubramanian, Balamurugan ^[1]; Pathak, Rohit ^[2]; Nguyen, Manh Cuong ^[3]; Valloppilly, Shah R. ^[1]; Skomski, Ralph ^[1]; Kashyap, Arti ^[2]; Wang, Cai-Zhuang ^[3]; Ho, Kai-Ming ^[3]; Hadjipanayis, George C. ^[4]; Sellmyer, David J. ^[1]

Univ. of Nebraska, Lincoln, NE (United States)
IIT Mandi, Himachal Pradesh (India)
Ames Lab., and Iowa State Univ., Ames, IA (United States)
Univ. of Delaware, Newark, DE (United States)

The onset of ferromagnetism in cobalt-tin alloys is investigated experimentally and theoretically. The Co_1+xSn alloys were prepared by rapid quenching from the melt and form a modified hexagonal NiAs-type crystal structure for 0.45 ≤ x ≤ 1. The magnetic behavior is described analytically and by density-functional theory using supercells and the coherent-potential approximation. The excess of Co concentration x, which enters the interstitial 2d sites in the hypothetical NiAs-ordered parent alloy CoSn, yields a Griffiths-like phase and, above a quantum critical point (x_c ≈ 0.65), a quantum phase transition to ferromagnetic order. Quantum critical exponents are determined on the paramagnetic and ferromagnetic sides of the transition and related to the nature of the magnetism in itinerant systems with different types of chemical disorder.

View Accepted Manuscript (DOE)

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States); Iowa State Univ., Ames, IA (United States); Univ. of Delaware, Newark, DE (United States); Univ. of Nebraska, Lincoln, NE (United States)

Sponsoring Organization:: National Science Foundation; National Science Foundation (NSF); USDOE Office of Science (SC)

Grant/Contract Number:: AC02-07CH11358; FG02-04ER46152; FG02-90ER45413

OSTI ID:: 1609559

Alternate ID(s):: OSTI ID: 1700694
OSTI ID: 1518501

Report Number(s):: IS--J-9959

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 18 Vol. 99; ISSN 2469-9950; ISSN PRBMDO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Structural and magnetic properties of Co-V nanoparticles Tosun, O.; Ruzybayev, I.; Abel, F. M. AIP Advances, Vol. 9, Issue 12 https://doi.org/10.1063/1.5130456	journal	December 2019
Chiral Magnetism and High-Temperature Skyrmions in B20-Ordered Co-Si Balasubramanian, Balamurugan; Manchanda, Priyanka; Pahari, Rabindra Physical Review Letters, Vol. 124, Issue 5 https://doi.org/10.1103/physrevlett.124.057201	journal	February 2020

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