Magnetic Hysteresis in Er Trimers on Cu(111)

Aparajita Singha; Fabio Donati; Christian Wäckerlin; Romana Baltic; Jan Dreiser; Marina Pivetta; Stefano Rusponi; Harald Brune

doi:10.1021/acs.nanolett.5b05214

Magnetic Hysteresis in Er Trimers on Cu(111)

Aparajita Singha, Fabio Donati, Christian Wäckerlin, Romana Baltic, Jan Dreiser, Marina Pivetta, Stefano Rusponi, Harald Brune

Department of Physics

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

29 Scopus citations

Abstract

We report magnetic hysteresis in Er clusters on Cu(111) starting from the size of three atoms. Combining X-ray magnetic circular dichroism, scanning tunneling microscopy, and mean-field nucleation theory, we determine the size-dependent magnetic properties of the Er clusters. Er atoms and dimers are paramagnetic, and their easy magnetization axes are oriented in-plane. In contrast, trimers and bigger clusters exhibit magnetic hysteresis at 2.5 K with a relaxation time of 2 min at 0.1 T and out-of-plane easy axis. This appearance of magnetic stability for trimers coincides with their enhanced structural stability.

Original language	English
Pages (from-to)	3475-3481
Number of pages	7
Journal	Nano Letters
Volume	16
Issue number	6
DOIs	https://doi.org/10.1021/acs.nanolett.5b05214
State	Published - 8 Jun 2016

Bibliographical note

Publisher Copyright:
© 2016 American Chemical Society.

Keywords

Rare earth clusters
X-ray magnetic circular dichroism
hysteresis
magnetic anisotropy
scanning tunneling microscopy
superlattice

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title = "Magnetic Hysteresis in Er Trimers on Cu(111)",

abstract = "We report magnetic hysteresis in Er clusters on Cu(111) starting from the size of three atoms. Combining X-ray magnetic circular dichroism, scanning tunneling microscopy, and mean-field nucleation theory, we determine the size-dependent magnetic properties of the Er clusters. Er atoms and dimers are paramagnetic, and their easy magnetization axes are oriented in-plane. In contrast, trimers and bigger clusters exhibit magnetic hysteresis at 2.5 K with a relaxation time of 2 min at 0.1 T and out-of-plane easy axis. This appearance of magnetic stability for trimers coincides with their enhanced structural stability.",

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AU - Singha, Aparajita

AU - Donati, Fabio

AU - Wäckerlin, Christian

AU - Baltic, Romana

AU - Dreiser, Jan

AU - Pivetta, Marina

AU - Rusponi, Stefano

AU - Brune, Harald

PY - 2016/6/8

Y1 - 2016/6/8

N2 - We report magnetic hysteresis in Er clusters on Cu(111) starting from the size of three atoms. Combining X-ray magnetic circular dichroism, scanning tunneling microscopy, and mean-field nucleation theory, we determine the size-dependent magnetic properties of the Er clusters. Er atoms and dimers are paramagnetic, and their easy magnetization axes are oriented in-plane. In contrast, trimers and bigger clusters exhibit magnetic hysteresis at 2.5 K with a relaxation time of 2 min at 0.1 T and out-of-plane easy axis. This appearance of magnetic stability for trimers coincides with their enhanced structural stability.

AB - We report magnetic hysteresis in Er clusters on Cu(111) starting from the size of three atoms. Combining X-ray magnetic circular dichroism, scanning tunneling microscopy, and mean-field nucleation theory, we determine the size-dependent magnetic properties of the Er clusters. Er atoms and dimers are paramagnetic, and their easy magnetization axes are oriented in-plane. In contrast, trimers and bigger clusters exhibit magnetic hysteresis at 2.5 K with a relaxation time of 2 min at 0.1 T and out-of-plane easy axis. This appearance of magnetic stability for trimers coincides with their enhanced structural stability.

KW - Rare earth clusters

KW - X-ray magnetic circular dichroism

KW - hysteresis

KW - magnetic anisotropy

KW - scanning tunneling microscopy

KW - superlattice

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DO - 10.1021/acs.nanolett.5b05214

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VL - 16

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EP - 3481

JO - Nano Letters

JF - Nano Letters

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ER -

Magnetic Hysteresis in Er Trimers on Cu(111)

Abstract

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Keywords

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