Effective reduction of PdCoO2 thin films via hydrogenation and sign tunable anomalous Hall effect

Gaurab Rimal; Caleb Schmidt; Hussein Hijazi; Leonard C. Feldman; Yiting Liu; Elizabeth Skoropata; Jason Lapano; Matthew Brahlek; Debangshu Mukherjee; Raymond R. Unocic; Matthew F. Chisholm; Yifei Sun; Haoming Yu; Shriram Ramanathan; Cheng Jun Sun; Hua Zhou; Seongshik Oh

doi:10.1103/PhysRevMaterials.5.L052001

Effective reduction of PdCoO2 thin films via hydrogenation and sign tunable anomalous Hall effect

Gaurab Rimal, Caleb Schmidt, Hussein Hijazi, Leonard C. Feldman, Yiting Liu, Elizabeth Skoropata, Jason Lapano, Matthew Brahlek, Debangshu Mukherjee, Raymond R. Unocic, Matthew F. Chisholm, Yifei Sun, Haoming Yu, Shriram Ramanathan, Cheng Jun Sun, Hua Zhou, Seongshik Oh

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

PdCoO2, belonging to a family of triangular oxides called delafossite, is one of the most conducting oxides. Its in-plane conductivity is comparable to those of the best metals and exhibits hydrodynamic electronic transport with an extremely long mean free path at cryogenic temperatures. Nonetheless, it is nonmagnetic despite the presence of the cobalt ion. Here, we show that a mild hydrogenation process reduces PdCoO2 thin films to an atomically mixed alloy of PdCo with strong out-of-plane ferromagnetism and sign-tunable anomalous Hall effect. Considering that many other compounds remain little affected under a similar hydrogenation condition, this discovery may provide a route to creating novel spintronic heterostructures combining strong ferromagnetism, involving oxides and other functional materials.

Original language	English
Article number	L052001
Journal	Physical Review Materials
Volume	5
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevMaterials.5.L052001
State	Published - May 2021

Funding

This work was mainly supported by the National Science Foundation (NSF) Grant No. DMR2004125 and the Army Research Office (ARO) Grant No. W911NF-20-1-0108. Y.L. acknowledges the state scholarship provided by the China Scholarship Council. E.S., J.L., M.B., M.F.C. acknowledge support from the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division (magnetic characterization and electron microscopy), and J.L., M.B. acknowledge the Quantum Science Center (QSC), a National Quantum Information Science Research Center of the United States Department of Energy (DOE) (x-ray diffraction). S.R. acknowledges National Science Foundation Award No. 1904081. The electron microscopy was supported in part by DOE's Materials Science and Engineering Division, and a portion of the STEM imaging was conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility (D.M., R.R.U.) This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility, operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. Extraordinary facility operations were supported, in part, by the DOE Office of Science through the National Virtual Biotechnology Laboratory, a consortium of DOE National Laboratories focused on the response to COVID-19 with funding provided by the Coronavirus CARES Act.

Funders	Funder number
National Quantum Information Science Research Center
National Virtual Biotechnology Laboratory
Quantum Science Center
National Science Foundation	DMR2004125
U.S. Department of Energy	1904081
Army Research Office	W911NF-20-1-0108
Office of Science
Basic Energy Sciences
Argonne National Laboratory	DE-AC02-06CH11357
Division of Materials Sciences and Engineering
China Scholarship Council

Access to Document

10.1103/PhysRevMaterials.5.L052001

Cite this

Rimal, G., Schmidt, C., Hijazi, H., Feldman, L. C., Liu, Y., Skoropata, E., Lapano, J., Brahlek, M., Mukherjee, D., Unocic, R. R., Chisholm, M. F., Sun, Y., Yu, H., Ramanathan, S., Sun, C. J., Zhou, H., & Oh, S. (2021). Effective reduction of PdCoO2 thin films via hydrogenation and sign tunable anomalous Hall effect. Physical Review Materials, 5(5), Article L052001. https://doi.org/10.1103/PhysRevMaterials.5.L052001

@article{22d3722078f24c418e5503cddde1f36a,

title = "Effective reduction of PdCoO2 thin films via hydrogenation and sign tunable anomalous Hall effect",

abstract = "PdCoO2, belonging to a family of triangular oxides called delafossite, is one of the most conducting oxides. Its in-plane conductivity is comparable to those of the best metals and exhibits hydrodynamic electronic transport with an extremely long mean free path at cryogenic temperatures. Nonetheless, it is nonmagnetic despite the presence of the cobalt ion. Here, we show that a mild hydrogenation process reduces PdCoO2 thin films to an atomically mixed alloy of PdCo with strong out-of-plane ferromagnetism and sign-tunable anomalous Hall effect. Considering that many other compounds remain little affected under a similar hydrogenation condition, this discovery may provide a route to creating novel spintronic heterostructures combining strong ferromagnetism, involving oxides and other functional materials.",

author = "Gaurab Rimal and Caleb Schmidt and Hussein Hijazi and Feldman, {Leonard C.} and Yiting Liu and Elizabeth Skoropata and Jason Lapano and Matthew Brahlek and Debangshu Mukherjee and Unocic, {Raymond R.} and Chisholm, {Matthew F.} and Yifei Sun and Haoming Yu and Shriram Ramanathan and Sun, {Cheng Jun} and Hua Zhou and Seongshik Oh",

note = "Publisher Copyright: {\textcopyright} 2021 American Physical Society.",

year = "2021",

month = may,

doi = "10.1103/PhysRevMaterials.5.L052001",

language = "English",

volume = "5",

journal = "Physical Review Materials",

issn = "2475-9953",

publisher = "American Physical Society",

number = "5",

}

Rimal, G, Schmidt, C, Hijazi, H, Feldman, LC, Liu, Y, Skoropata, E, Lapano, J, Brahlek, M , Mukherjee, D, Unocic, RR, Chisholm, MF, Sun, Y, Yu, H, Ramanathan, S, Sun, CJ, Zhou, H & Oh, S 2021, 'Effective reduction of PdCoO2 thin films via hydrogenation and sign tunable anomalous Hall effect', Physical Review Materials, vol. 5, no. 5, L052001. https://doi.org/10.1103/PhysRevMaterials.5.L052001

TY - JOUR

T1 - Effective reduction of PdCoO2 thin films via hydrogenation and sign tunable anomalous Hall effect

AU - Rimal, Gaurab

AU - Schmidt, Caleb

AU - Hijazi, Hussein

AU - Feldman, Leonard C.

AU - Liu, Yiting

AU - Skoropata, Elizabeth

AU - Lapano, Jason

AU - Brahlek, Matthew

AU - Mukherjee, Debangshu

AU - Unocic, Raymond R.

AU - Chisholm, Matthew F.

AU - Sun, Yifei

AU - Yu, Haoming

AU - Ramanathan, Shriram

AU - Sun, Cheng Jun

AU - Zhou, Hua

AU - Oh, Seongshik

PY - 2021/5

Y1 - 2021/5

N2 - PdCoO2, belonging to a family of triangular oxides called delafossite, is one of the most conducting oxides. Its in-plane conductivity is comparable to those of the best metals and exhibits hydrodynamic electronic transport with an extremely long mean free path at cryogenic temperatures. Nonetheless, it is nonmagnetic despite the presence of the cobalt ion. Here, we show that a mild hydrogenation process reduces PdCoO2 thin films to an atomically mixed alloy of PdCo with strong out-of-plane ferromagnetism and sign-tunable anomalous Hall effect. Considering that many other compounds remain little affected under a similar hydrogenation condition, this discovery may provide a route to creating novel spintronic heterostructures combining strong ferromagnetism, involving oxides and other functional materials.

AB - PdCoO2, belonging to a family of triangular oxides called delafossite, is one of the most conducting oxides. Its in-plane conductivity is comparable to those of the best metals and exhibits hydrodynamic electronic transport with an extremely long mean free path at cryogenic temperatures. Nonetheless, it is nonmagnetic despite the presence of the cobalt ion. Here, we show that a mild hydrogenation process reduces PdCoO2 thin films to an atomically mixed alloy of PdCo with strong out-of-plane ferromagnetism and sign-tunable anomalous Hall effect. Considering that many other compounds remain little affected under a similar hydrogenation condition, this discovery may provide a route to creating novel spintronic heterostructures combining strong ferromagnetism, involving oxides and other functional materials.

UR - http://www.scopus.com/inward/record.url?scp=85106065676&partnerID=8YFLogxK

U2 - 10.1103/PhysRevMaterials.5.L052001

DO - 10.1103/PhysRevMaterials.5.L052001

M3 - Article

AN - SCOPUS:85106065676

SN - 2475-9953

VL - 5

JO - Physical Review Materials

JF - Physical Review Materials

IS - 5

M1 - L052001

ER -

Effective reduction of PdCoO2 thin films via hydrogenation and sign tunable anomalous Hall effect

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this