Determining Curie temperature of (Ga,Mn)As samples based on electrical transport measurements: Low Curie temperature case.

Adam Kwiatkowski; Marta Gryglas-Borysiewicz; Piotr Juszynski; Jacek Przybytek; Maciej Sawicki; Janusz Sadowski; Dariusz Wasik; Michal Baj

doi:10.1063/1.4953628

Determining Curie temperature of (Ga,Mn)As samples based on electrical transport measurements: Low Curie temperature case.

Adam Kwiatkowski, Marta Gryglas-Borysiewicz, Piotr Juszynski, Jacek Przybytek, Maciej Sawicki, Janusz Sadowski, Dariusz Wasik, Michal Baj

MAX IV Laboratory

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

Abstract

In this paper, we show that the widely accepted method of the determination of Curie temperature (Tc) in (Ga,Mn)As samples, based on the position of the peak in the temperature derivative of the resistivity, completely fails in the case of non-metallic and low-TC unannealed samples. In this case, we propose an alternative method, also based on electric transport measurements, which exploits temperature dependence of the second derivative of the resistivity upon magnetic field.

Original language	English
Article number	242103
Pages (from-to)	1-4
Number of pages	4
Journal	Applied Physics Letters
Volume	108
Issue number	24
DOIs	https://doi.org/10.1063/1.4953628
Publication status	Published - 2016 Jun 14

Subject classification (UKÄ)

Natural Sciences

Free keywords

dilute ferromagnetic semiconductors, molecular beam epitaxy

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title = "Determining Curie temperature of (Ga,Mn)As samples based on electrical transport measurements: Low Curie temperature case.",

abstract = "In this paper, we show that the widely accepted method of the determination of Curie temperature (Tc) in (Ga,Mn)As samples, based on the position of the peak in the temperature derivative of the resistivity, completely fails in the case of non-metallic and low-TC unannealed samples. In this case, we propose an alternative method, also based on electric transport measurements, which exploits temperature dependence of the second derivative of the resistivity upon magnetic field.",

keywords = "dilute ferromagnetic semiconductors, molecular beam epitaxy",

author = "Adam Kwiatkowski and Marta Gryglas-Borysiewicz and Piotr Juszynski and Jacek Przybytek and Maciej Sawicki and Janusz Sadowski and Dariusz Wasik and Michal Baj",

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AU - Kwiatkowski, Adam

AU - Gryglas-Borysiewicz, Marta

AU - Juszynski, Piotr

AU - Przybytek, Jacek

AU - Sawicki, Maciej

AU - Sadowski, Janusz

AU - Wasik, Dariusz

AU - Baj, Michal

PY - 2016/6/14

Y1 - 2016/6/14

N2 - In this paper, we show that the widely accepted method of the determination of Curie temperature (Tc) in (Ga,Mn)As samples, based on the position of the peak in the temperature derivative of the resistivity, completely fails in the case of non-metallic and low-TC unannealed samples. In this case, we propose an alternative method, also based on electric transport measurements, which exploits temperature dependence of the second derivative of the resistivity upon magnetic field.

AB - In this paper, we show that the widely accepted method of the determination of Curie temperature (Tc) in (Ga,Mn)As samples, based on the position of the peak in the temperature derivative of the resistivity, completely fails in the case of non-metallic and low-TC unannealed samples. In this case, we propose an alternative method, also based on electric transport measurements, which exploits temperature dependence of the second derivative of the resistivity upon magnetic field.

KW - dilute ferromagnetic semiconductors, molecular beam epitaxy

U2 - 10.1063/1.4953628

DO - 10.1063/1.4953628

M3 - Article

SN - 0003-6951

VL - 108

SP - 1

EP - 4

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 24

M1 - 242103

ER -

Determining Curie temperature of (Ga,Mn)As samples based on electrical transport measurements: Low Curie temperature case.

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