Search Menu
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information
Search Scholarly Publications

Title: Helical spin structure in iron chains with hybridized boundaries

Journal Article · · Applied Physics Letters
DOI: https://doi.org/10.1063/5.0022926 · OSTI ID:1724325
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [1]
  1. Univ. of California, San Diego, CA (United States)
  2. Univ. de Chile, Santiago (Chile); Center for the Development of Nanoscience and Nanotechnology (CEDENNA), Santiago (Chile)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Univ. of Texas at San Antonio, TX (United States); General Atomics, San Diego, CA (United States)
+ Show Author Affiliations

In this paper, we have compared the magnetic properties of well-controlled ultra-short (≤50 nm) atomic iron (Fe) chains embedded in Fe-phthalocyanine films with those in Fe–hydrogen (H2) phthalocyanine superlattices. Surprisingly, we found that the coercivity of the atomic chains with free boundary conditions is independent of the chain length, whereas the one subject to hybridization of the chain ends exhibits an unexpected length dependence. These findings suggest that ferromagnetism in the free-boundary condition system is caused by an intrinsic indirect exchange. On the other hand, controlled boundary conditions produce a helical spin structure due to an extrinsic indirect exchange, which arises from the interaction between iron atoms at the ends of the chain and the hydrogen in the H2 phthalocyanine spacer. As a consequence, during magnetic reversal, ultra-short iron chains subject to boundary clamping develop a helical spin structure, leading to increased coercivity. These findings suggest unique insights and ideas for the design of atomic-scale ultra-dense magnetic storage nanodevices.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC); National Science Foundation (NSF)
Grant/Contract Number:
AC52-07NA27344; AC02-05CH11231
OSTI ID:
1724325
Report Number(s):
LLNL-JRNL--768283; 958148
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 21 Vol. 117; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (49)

Molecular Self-Assembly at Solid Surfaces journal September 2011
Density functional theory of transition metal phthalocyanines, I: electronic structure of NiPc and CoPc—self-interaction effects journal December 2008
Coercivity Control of Variable-Length Iron Chains in Phthalocyanine Thin Films journal May 2012
Continuum dynamics of the 1-D Heisenberg antiferromagnet: Identification with the O(3) nonlinear sigma model journal February 1983
Electronic properties of transition metal phthalocyanines: The impact of the central metal atom (d5–d10) journal September 2010
Magnetic Properties of Semiconducting Spinel CdCr 2 S 4 Nanostructured Films Grown by Low-Pressure Metal–Organic Chemical Vapor Deposition journal July 2019
Quantum Spin Transport in Carbon Chains journal August 2010
Ferromagnetism in one-dimensional monatomic metal chains journal March 2002
Beating the superparamagnetic limit with exchange bias journal June 2003
Quantum criticality and universal scaling of a quantum antiferromagnet journal March 2005
Overcoming thermal fluctuations journal July 2003
Topological–chiral magnetic interactions driven by emergent orbital magnetism journal January 2020
Interface-driven chiral magnetism and current-driven domain walls in insulating magnetic garnets journal April 2019
Chiral molecules and the electron spin journal March 2019
Molecular spintronics: the role of coordination chemistry journal January 2016
Molecular vs. inorganic spintronics: the role of molecular materials and single molecules journal January 2009
Relationship between Systems of Impenetrable Bosons and Fermions in One Dimension journal November 1960
Transition metal phthalocyanines: Insight into the electronic structure from soft x-ray spectroscopy journal August 2012
The role of micro-shorts and electrode-film interface in the electrical transport of ultra-thin metallophthalocyanine capacitive devices journal September 2012
Electronic structure differences between H 2 -, Fe-, Co-, and Cu-phthalocyanine highly oriented thin films observed using NEXAFS spectroscopy journal July 2013
Molecular tilting and columnar stacking of Fe phthalocyanine thin films on Au(111) journal May 2015
Chiral symmetry and scale invariance breaking in spin chains journal February 2020
Berry phase theory of Dzyaloshinskii–Moriya interaction and spin–orbit torques journal February 2014
Experimental characterization of coherent magnetization transport in a one-dimensional spin system journal October 2011
2p x-ray absorption of iron-phthalocyanine journal November 2009
Entanglement, correlations, and the energy gap in many-body quantum systems journal March 2004
Propagation of quantum information through a spin system journal May 2004
Structural refinement of superlattices from x-ray diffraction journal April 1992
Quantitative structural analysis of organic thin films: An x-ray diffraction study journal September 2005
Structure-dependent exchange in the organic magnets Cu(II)Pc and Mn(II)Pc journal May 2008
Highly unquenched orbital moment in textured Fe-phthalocyanine thin films journal May 2010
Spin-orbit coupling and its effects in organic solids journal March 2012
Substrate-controlled ferromagnetism in iron phthalocyanine films due to one-dimensional iron chains journal July 2012
Tunable finite-sized chains to control magnetic relaxation journal January 2017
Probing Superexchange Interaction in Molecular Magnets by Spin-Flip Spectroscopy and Microscopy journal November 2008
Novel Chiral Magnetic Domain Wall Structure in Fe / Ni / Cu ( 001 ) Films journal April 2013
Self-Organized Growth, Structure, and Magnetism of Monatomic Transition-Metal Oxide Chains journal July 2016
Chiral Magnetism and High-Temperature Skyrmions in B20-Ordered Co-Si journal February 2020
Absence of Ferromagnetism or Antiferromagnetism in One- or Two-Dimensional Isotropic Heisenberg Models journal November 1966
Some Exact Results for the Many-Body Problem in one Dimension with Repulsive Delta-Function Interaction journal December 1967
New Class of Layered Materials journal June 1980
Nonlinear Field Theory of Large-Spin Heisenberg Antiferromagnets: Semiclassically Quantized Solitons of the One-Dimensional Easy-Axis Néel State journal April 1983
Magnetic Spin Ladder ( C 5 H 12 N ) 2 Cu Br 4 : High-Field Magnetization and Scaling near Quantum Criticality journal May 2001
Quantum Confinement in Monatomic Cu Chains on Cu(111) journal February 2004
Giant Magnetic Anisotropy of Single Cobalt Atoms and Nanoparticles journal May 2003
Spin Coupling in Engineered Atomic Structures journal May 2006
Quantum Criticality in an Ising Chain: Experimental Evidence for Emergent E 8 Symmetry journal January 2010
Quantum Criticality: Competing Ground States in Low Dimensions journal April 2000
Dzyaloshinskii-Moriya interaction and magnetic ordering in 1D and 2D at nonzero T journal May 2014

Similar Records

Chiral symmetry and scale invariance breaking in spin chains
Journal Article · 2020 · AIP Advances · OSTI ID:1800685
+2 more
Effect of hydrogen on the interlayer exchange coupling in Fe/V superlattices
Journal Article · 2000 · Physical Review. B, Condensed Matter and Materials Physics · OSTI ID:20215506
+3 more
XMCD and XMCD-PEEM Studies on Magnetic-Field-Assisted Self-Assembled 1D Nanochains of Spherical Ferrite Particles
Journal Article · 2017 · Advanced Functional Materials · OSTI ID:1379918
+7 more

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY